Restoring authorship annotation for Vlad Yaroslavlev <vladon@vladon.com>. Commit 2 of 2.

86 files changed, 927 insertions, 927 deletions

diff --git a/util/system/align.h b/util/system/align.h
index 0261b6848e..ea0bbc5b46 100644
--- a/util/system/align.h
+++ b/util/system/align.h
@@ -5,45 +5,45 @@
 #include <util/generic/bitops.h>
 
 template <class T>
-static inline T AlignDown(T len, T align) noexcept { 
+static inline T AlignDown(T len, T align) noexcept {
     Y_ASSERT(IsPowerOf2(align)); // align should be power of 2
     return len & ~(align - 1);
 }
 
 template <class T>
-static inline T AlignUp(T len, T align) noexcept { 
+static inline T AlignUp(T len, T align) noexcept {
     const T alignedResult = AlignDown(len + (align - 1), align);
     Y_ASSERT(alignedResult >= len); // check for overflow
     return alignedResult;
 }
 
 template <class T>
-static inline T AlignUpSpace(T len, T align) noexcept { 
+static inline T AlignUpSpace(T len, T align) noexcept {
     Y_ASSERT(IsPowerOf2(align));       // align should be power of 2
     return ((T)0 - len) & (align - 1); // AlignUp(len, align) - len;
 }
 
 template <class T>
-static inline T* AlignUp(T* ptr, size_t align) noexcept { 
+static inline T* AlignUp(T* ptr, size_t align) noexcept {
     return (T*)AlignUp((uintptr_t)ptr, align);
 }
 
 template <class T>
-static inline T* AlignDown(T* ptr, size_t align) noexcept { 
+static inline T* AlignDown(T* ptr, size_t align) noexcept {
     return (T*)AlignDown((uintptr_t)ptr, align);
 }
 
 template <class T>
-static inline T AlignUp(T t) noexcept { 
+static inline T AlignUp(T t) noexcept {
     return AlignUp(t, (size_t)PLATFORM_DATA_ALIGN);
 }
 
 template <class T>
-static inline T AlignDown(T t) noexcept { 
+static inline T AlignDown(T t) noexcept {
     return AlignDown(t, (size_t)PLATFORM_DATA_ALIGN);
 }
 
 template <class T>
-static inline T Align(T t) noexcept { 
+static inline T Align(T t) noexcept {
     return AlignUp(t);
 }
diff --git a/util/system/atexit.cpp b/util/system/atexit.cpp
index 4ae0d9c3e7..74fb10b6b1 100644
--- a/util/system/atexit.cpp
+++ b/util/system/atexit.cpp
@@ -34,7 +34,7 @@ namespace {
         {
         }
 
-        inline void Finish() noexcept { 
+        inline void Finish() noexcept {
             AtomicSet(FinishStarted_, 1);
 
             auto guard = Guard(Lock_);
@@ -72,8 +72,8 @@ namespace {
     private:
         TAdaptiveLock Lock_;
         TAtomic FinishStarted_;
-        TDeque<TFunc> Store_; 
-        TPriorityQueue<TFunc*, TVector<TFunc*>, TCmp> Items_; 
+        TDeque<TFunc> Store_;
+        TPriorityQueue<TFunc*, TVector<TFunc*>, TCmp> Items_;
     };
 
     static TAtomic atExitLock = 0;
diff --git a/util/system/atomic_ut.cpp b/util/system/atomic_ut.cpp
index 0265f57c60..07211ffba7 100644
--- a/util/system/atomic_ut.cpp
+++ b/util/system/atomic_ut.cpp
@@ -213,11 +213,11 @@ using TAltAtomic = volatile TChooser<TAtomicBase, long, long long>::TdType;
 
 class TTTest: public TAtomicTest<TAltAtomic> {
 public:
-    TString Name() const noexcept override { 
+    TString Name() const noexcept override {
         return "TAtomicTest<TAltAtomic>";
     }
 
-    static TString StaticName() noexcept { 
+    static TString StaticName() noexcept {
         return "TAtomicTest<TAltAtomic>";
     }
 };
diff --git a/util/system/backtrace.cpp b/util/system/backtrace.cpp
index 3e6e05a61f..b77fe58fb1 100644
--- a/util/system/backtrace.cpp
+++ b/util/system/backtrace.cpp
@@ -6,7 +6,7 @@
 #include <util/stream/output.h>
 #include <util/stream/format.h>
 #include <util/generic/array_ref.h>
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 
 #ifdef _win_
     #include "mutex.h"
@@ -278,7 +278,7 @@ void TBackTrace::PrintTo(IOutputStream& out) const {
     FormatBackTraceFn(&out, Data, Size);
 }
 
-TString TBackTrace::PrintToString() const { 
+TString TBackTrace::PrintToString() const {
     TStringStream ss;
     PrintTo(ss);
     return ss.Str();
diff --git a/util/system/backtrace.h b/util/system/backtrace.h
index 0f91f96951..2fce7585c3 100644
--- a/util/system/backtrace.h
+++ b/util/system/backtrace.h
@@ -35,7 +35,7 @@ public:
     TBackTrace();
     void Capture();
     void PrintTo(IOutputStream&) const;
-    TString PrintToString() const; 
+    TString PrintToString() const;
     size_t size() const;
     const void* const* data() const;
     operator TBackTraceView() const;
diff --git a/util/system/backtrace_ut.cpp b/util/system/backtrace_ut.cpp
index 766e6bbfa2..9b5ead71bc 100644
--- a/util/system/backtrace_ut.cpp
+++ b/util/system/backtrace_ut.cpp
@@ -31,7 +31,7 @@ void SomeMethod() {
     return;
 #endif
 
-    UNIT_ASSERT(out.Empty() || out.Str().find("SomeMethod") != TString::npos); 
+    UNIT_ASSERT(out.Empty() || out.Str().find("SomeMethod") != TString::npos);
 }
 
 class TBackTraceTest: public TTestBase {
diff --git a/util/system/byteorder.h b/util/system/byteorder.h
index 56dc3943a7..94b9fea515 100644
--- a/util/system/byteorder.h
+++ b/util/system/byteorder.h
@@ -33,7 +33,7 @@
 #endif
 
 #ifndef SwapBytes16
-inline ui16 SwapBytes16(ui16 val) noexcept { 
+inline ui16 SwapBytes16(ui16 val) noexcept {
     #define byte_n(__val, __n) ((((unsigned char*)(&__val))[__n]))
     DoSwap(byte_n(val, 0), byte_n(val, 1));
     return val;
@@ -42,7 +42,7 @@ inline ui16 SwapBytes16(ui16 val) noexcept {
 #endif
 
 #ifndef SwapBytes32
-inline ui32 SwapBytes32(ui32 val) noexcept { 
+inline ui32 SwapBytes32(ui32 val) noexcept {
     #define byte_n(__val, __n) ((((unsigned char*)(&__val))[__n]))
     DoSwap(byte_n(val, 0), byte_n(val, 3));
     DoSwap(byte_n(val, 1), byte_n(val, 2));
@@ -52,7 +52,7 @@ inline ui32 SwapBytes32(ui32 val) noexcept {
 #endif
 
 #ifndef SwapBytes64
-inline ui64 SwapBytes64(ui64 val) noexcept { 
+inline ui64 SwapBytes64(ui64 val) noexcept {
     union {
         ui64 val;
         ui32 p[2];
@@ -66,8 +66,8 @@ inline ui64 SwapBytes64(ui64 val) noexcept {
 }
 #endif
 
-//for convenience 
-static inline ui8 SwapBytes8(ui8 v) noexcept { 
+//for convenience
+static inline ui8 SwapBytes8(ui8 v) noexcept {
     return v;
 }
 
@@ -94,22 +94,22 @@ namespace NSwapBytes {
 }
 
 template <class T>
-inline T SwapBytes(T val) noexcept { 
+inline T SwapBytes(T val) noexcept {
     return NSwapBytes::TSwapBytesHelper<sizeof(T) * 8>::Swap(val);
 }
 
 template <class T>
-inline T LittleToBig(T val) noexcept { 
+inline T LittleToBig(T val) noexcept {
     return SwapBytes(val);
 }
 
 template <class T>
-inline T BigToLittle(T val) noexcept { 
+inline T BigToLittle(T val) noexcept {
     return LittleToBig(val);
 }
 
 template <class T>
-inline T HostToInet(T val) noexcept { 
+inline T HostToInet(T val) noexcept {
 #if defined(_big_endian_)
     return val;
 #elif defined(_little_endian_)
@@ -120,12 +120,12 @@ inline T HostToInet(T val) noexcept {
 }
 
 template <class T>
-inline T InetToHost(T val) noexcept { 
+inline T InetToHost(T val) noexcept {
     return HostToInet(val);
 }
 
 template <class T>
-inline T HostToLittle(T val) noexcept { 
+inline T HostToLittle(T val) noexcept {
 #if defined(_big_endian_)
     return BigToLittle(val);
 #elif defined(_little_endian_)
@@ -136,6 +136,6 @@ inline T HostToLittle(T val) noexcept {
 }
 
 template <class T>
-inline T LittleToHost(T val) noexcept { 
+inline T LittleToHost(T val) noexcept {
     return HostToLittle(val);
 }
diff --git a/util/system/compiler.h b/util/system/compiler.h
index 7782564207..b373edcc46 100644
--- a/util/system/compiler.h
+++ b/util/system/compiler.h
@@ -24,7 +24,7 @@
  * int main() {
  *    Hi();         // void Hi()
  *    Do<int>();    // void Do() [T = int]
- *    Do<TString>(); // void Do() [T = TString] 
+ *    Do<TString>(); // void Do() [T = TString]
  * }
  * @endcode
  */
@@ -216,8 +216,8 @@ constexpr Y_FORCE_INLINE int Y_UNUSED(Types&&...) {
  *
  * // we know that xs and ys are non-negative from domain knowledge,
  * // but we can't change the types of xs and ys because of API constrains
- * int Foo(const TVector<int>& xs, const TVector<int>& ys) { 
- *     TVector<int> avgs; 
+ * int Foo(const TVector<int>& xs, const TVector<int>& ys) {
+ *     TVector<int> avgs;
  *     avgs.resize(xs.size());
  *     for (size_t i = 0; i < xs.size(); ++i) {
  *         auto x = xs[i];
@@ -313,12 +313,12 @@ _YandexAbort();
 #else
     #define Y_WEAK
 #endif
- 
+
 #if defined(__CUDACC_VER_MAJOR__)
     #define Y_CUDA_AT_LEAST(x, y) (__CUDACC_VER_MAJOR__ > x || (__CUDACC_VER_MAJOR__ == x && __CUDACC_VER_MINOR__ >= y))
 #else
     #define Y_CUDA_AT_LEAST(x, y) 0
-#endif 
+#endif
 
 // NVidia CUDA C++ Compiler did not know about noexcept keyword until version 9.0
 #if !Y_CUDA_AT_LEAST(9, 0)
@@ -336,145 +336,145 @@ _YandexAbort();
     #define Y_LEAF
     #define Y_WRAPPER
 #endif
- 
-/** 
- * @def Y_PRAGMA 
- * 
- * Macro for use in other macros to define compiler pragma 
- * See below for other usage examples 
- * 
- * @code 
- * #if defined(__clang__) || defined(__GNUC__) 
- * #define Y_PRAGMA_NO_WSHADOW \ 
- *     Y_PRAGMA("GCC diagnostic ignored \"-Wshadow\"") 
- * #elif defined(_MSC_VER) 
- * #define Y_PRAGMA_NO_WSHADOW \ 
- *     Y_PRAGMA("warning(disable:4456 4457") 
- * #else 
- * #define Y_PRAGMA_NO_WSHADOW 
- * #endif 
- * @endcode 
- */ 
-#if defined(__clang__) || defined(__GNUC__) 
+
+/**
+ * @def Y_PRAGMA
+ *
+ * Macro for use in other macros to define compiler pragma
+ * See below for other usage examples
+ *
+ * @code
+ * #if defined(__clang__) || defined(__GNUC__)
+ * #define Y_PRAGMA_NO_WSHADOW \
+ *     Y_PRAGMA("GCC diagnostic ignored \"-Wshadow\"")
+ * #elif defined(_MSC_VER)
+ * #define Y_PRAGMA_NO_WSHADOW \
+ *     Y_PRAGMA("warning(disable:4456 4457")
+ * #else
+ * #define Y_PRAGMA_NO_WSHADOW
+ * #endif
+ * @endcode
+ */
+#if defined(__clang__) || defined(__GNUC__)
     #define Y_PRAGMA(x) _Pragma(x)
 #elif defined(_MSC_VER)
     #define Y_PRAGMA(x) __pragma(x)
-#else 
+#else
     #define Y_PRAGMA(x)
-#endif 
- 
-/** 
- * @def Y_PRAGMA_DIAGNOSTIC_PUSH 
- * 
- * Cross-compiler pragma to save diagnostic settings 
- * 
- * @see 
- *     GCC: https://gcc.gnu.org/onlinedocs/gcc/Diagnostic-Pragmas.html 
- *     MSVC: https://msdn.microsoft.com/en-us/library/2c8f766e.aspx 
- *     Clang: https://clang.llvm.org/docs/UsersManual.html#controlling-diagnostics-via-pragmas 
- * 
- * @code 
- * Y_PRAGMA_DIAGNOSTIC_PUSH 
- * @endcode 
- */ 
-#if defined(__clang__) || defined(__GNUC__) 
+#endif
+
+/**
+ * @def Y_PRAGMA_DIAGNOSTIC_PUSH
+ *
+ * Cross-compiler pragma to save diagnostic settings
+ *
+ * @see
+ *     GCC: https://gcc.gnu.org/onlinedocs/gcc/Diagnostic-Pragmas.html
+ *     MSVC: https://msdn.microsoft.com/en-us/library/2c8f766e.aspx
+ *     Clang: https://clang.llvm.org/docs/UsersManual.html#controlling-diagnostics-via-pragmas
+ *
+ * @code
+ * Y_PRAGMA_DIAGNOSTIC_PUSH
+ * @endcode
+ */
+#if defined(__clang__) || defined(__GNUC__)
     #define Y_PRAGMA_DIAGNOSTIC_PUSH \
         Y_PRAGMA("GCC diagnostic push")
-#elif defined(_MSC_VER) 
+#elif defined(_MSC_VER)
     #define Y_PRAGMA_DIAGNOSTIC_PUSH \
         Y_PRAGMA(warning(push))
-#else 
+#else
     #define Y_PRAGMA_DIAGNOSTIC_PUSH
-#endif 
- 
-/** 
- * @def Y_PRAGMA_DIAGNOSTIC_POP 
- * 
- * Cross-compiler pragma to restore diagnostic settings 
- * 
- * @see 
- *     GCC: https://gcc.gnu.org/onlinedocs/gcc/Diagnostic-Pragmas.html 
- *     MSVC: https://msdn.microsoft.com/en-us/library/2c8f766e.aspx 
- *     Clang: https://clang.llvm.org/docs/UsersManual.html#controlling-diagnostics-via-pragmas 
- * 
- * @code 
- * Y_PRAGMA_DIAGNOSTIC_POP 
- * @endcode 
- */ 
-#if defined(__clang__) || defined(__GNUC__) 
+#endif
+
+/**
+ * @def Y_PRAGMA_DIAGNOSTIC_POP
+ *
+ * Cross-compiler pragma to restore diagnostic settings
+ *
+ * @see
+ *     GCC: https://gcc.gnu.org/onlinedocs/gcc/Diagnostic-Pragmas.html
+ *     MSVC: https://msdn.microsoft.com/en-us/library/2c8f766e.aspx
+ *     Clang: https://clang.llvm.org/docs/UsersManual.html#controlling-diagnostics-via-pragmas
+ *
+ * @code
+ * Y_PRAGMA_DIAGNOSTIC_POP
+ * @endcode
+ */
+#if defined(__clang__) || defined(__GNUC__)
     #define Y_PRAGMA_DIAGNOSTIC_POP \
         Y_PRAGMA("GCC diagnostic pop")
-#elif defined(_MSC_VER) 
+#elif defined(_MSC_VER)
     #define Y_PRAGMA_DIAGNOSTIC_POP \
         Y_PRAGMA(warning(pop))
-#else 
+#else
     #define Y_PRAGMA_DIAGNOSTIC_POP
-#endif 
- 
-/** 
- * @def Y_PRAGMA_NO_WSHADOW 
- * 
- * Cross-compiler pragma to disable warnings about shadowing variables 
- * 
- * @code 
- * Y_PRAGMA_DIAGNOSTIC_PUSH 
- * Y_PRAGMA_NO_WSHADOW 
- * 
- * // some code which use variable shadowing, e.g.: 
- * 
- * for (int i = 0; i < 100; ++i) { 
- *   Use(i); 
- * 
- *   for (int i = 42; i < 100500; ++i) { // this i is shadowing previous i 
- *       AnotherUse(i); 
- *    } 
- * } 
- * 
- * Y_PRAGMA_DIAGNOSTIC_POP 
- * @endcode 
- */ 
-#if defined(__clang__) || defined(__GNUC__) 
+#endif
+
+/**
+ * @def Y_PRAGMA_NO_WSHADOW
+ *
+ * Cross-compiler pragma to disable warnings about shadowing variables
+ *
+ * @code
+ * Y_PRAGMA_DIAGNOSTIC_PUSH
+ * Y_PRAGMA_NO_WSHADOW
+ *
+ * // some code which use variable shadowing, e.g.:
+ *
+ * for (int i = 0; i < 100; ++i) {
+ *   Use(i);
+ *
+ *   for (int i = 42; i < 100500; ++i) { // this i is shadowing previous i
+ *       AnotherUse(i);
+ *    }
+ * }
+ *
+ * Y_PRAGMA_DIAGNOSTIC_POP
+ * @endcode
+ */
+#if defined(__clang__) || defined(__GNUC__)
     #define Y_PRAGMA_NO_WSHADOW \
         Y_PRAGMA("GCC diagnostic ignored \"-Wshadow\"")
-#elif defined(_MSC_VER) 
+#elif defined(_MSC_VER)
     #define Y_PRAGMA_NO_WSHADOW \
         Y_PRAGMA(warning(disable : 4456 4457))
-#else 
+#else
     #define Y_PRAGMA_NO_WSHADOW
-#endif 
- 
-/** 
- * @ def Y_PRAGMA_NO_UNUSED_FUNCTION 
- * 
- * Cross-compiler pragma to disable warnings about unused functions 
- * 
- * @see 
- *     GCC: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html 
- *     Clang: https://clang.llvm.org/docs/DiagnosticsReference.html#wunused-function 
- *     MSVC: there is no such warning 
- * 
- * @code 
- * Y_PRAGMA_DIAGNOSTIC_PUSH 
- * Y_PRAGMA_NO_UNUSED_FUNCTION 
- * 
- * // some code which introduces a function which later will not be used, e.g.: 
- * 
- * void Foo() { 
- * } 
- * 
- * int main() { 
- *     return 0; // Foo() never called 
- * } 
- * 
- * Y_PRAGMA_DIAGNOSTIC_POP 
- * @endcode 
- */ 
-#if defined(__clang__) || defined(__GNUC__) 
+#endif
+
+/**
+ * @ def Y_PRAGMA_NO_UNUSED_FUNCTION
+ *
+ * Cross-compiler pragma to disable warnings about unused functions
+ *
+ * @see
+ *     GCC: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
+ *     Clang: https://clang.llvm.org/docs/DiagnosticsReference.html#wunused-function
+ *     MSVC: there is no such warning
+ *
+ * @code
+ * Y_PRAGMA_DIAGNOSTIC_PUSH
+ * Y_PRAGMA_NO_UNUSED_FUNCTION
+ *
+ * // some code which introduces a function which later will not be used, e.g.:
+ *
+ * void Foo() {
+ * }
+ *
+ * int main() {
+ *     return 0; // Foo() never called
+ * }
+ *
+ * Y_PRAGMA_DIAGNOSTIC_POP
+ * @endcode
+ */
+#if defined(__clang__) || defined(__GNUC__)
     #define Y_PRAGMA_NO_UNUSED_FUNCTION \
         Y_PRAGMA("GCC diagnostic ignored \"-Wunused-function\"")
-#else 
+#else
     #define Y_PRAGMA_NO_UNUSED_FUNCTION
-#endif 
+#endif
 
 /**
  * @ def Y_PRAGMA_NO_UNUSED_PARAMETER
@@ -514,42 +514,42 @@ _YandexAbort();
     #define Y_PRAGMA_NO_UNUSED_PARAMETER
 #endif
 
-/** 
- * @def Y_PRAGMA_NO_DEPRECATED 
- * 
- * Cross compiler pragma to disable warnings and errors about deprecated 
- * 
- * @see 
- *     GCC: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html 
- *     Clang: https://clang.llvm.org/docs/DiagnosticsReference.html#wdeprecated 
- *     MSVC: https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4996?view=vs-2017 
- * 
- * @code 
- * Y_PRAGMA_DIAGNOSTIC_PUSH 
- * Y_PRAGMA_NO_DEPRECATED 
- * 
- * [deprecated] void foo() { 
- *     // ... 
- * } 
- * 
- * int main() { 
- *     foo(); 
- *     return 0; 
- * } 
- * 
- * Y_PRAGMA_DIAGNOSTIC_POP 
- * @endcode 
- */ 
+/**
+ * @def Y_PRAGMA_NO_DEPRECATED
+ *
+ * Cross compiler pragma to disable warnings and errors about deprecated
+ *
+ * @see
+ *     GCC: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
+ *     Clang: https://clang.llvm.org/docs/DiagnosticsReference.html#wdeprecated
+ *     MSVC: https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4996?view=vs-2017
+ *
+ * @code
+ * Y_PRAGMA_DIAGNOSTIC_PUSH
+ * Y_PRAGMA_NO_DEPRECATED
+ *
+ * [deprecated] void foo() {
+ *     // ...
+ * }
+ *
+ * int main() {
+ *     foo();
+ *     return 0;
+ * }
+ *
+ * Y_PRAGMA_DIAGNOSTIC_POP
+ * @endcode
+ */
 #if defined(__clang__) || defined(__GNUC__)
     #define Y_PRAGMA_NO_DEPRECATED \
         Y_PRAGMA("GCC diagnostic ignored \"-Wdeprecated\"")
-#elif defined(_MSC_VER) 
+#elif defined(_MSC_VER)
     #define Y_PRAGMA_NO_DEPRECATED \
         Y_PRAGMA(warning(disable : 4996))
-#else 
+#else
     #define Y_PRAGMA_NO_DEPRECATED
-#endif 
- 
+#endif
+
 // Memory sanitizer sometimes doesn't correctly set parameter shadow of constant functions.
 #if (defined(__clang__) || defined(__GNUC__)) && !defined(_msan_enabled_)
     /**
@@ -584,23 +584,23 @@ _YandexAbort();
 #if !defined(Y_PURE_FUNCTION)
     #define Y_PURE_FUNCTION
 #endif
- 
-/** 
- * @ def Y_HAVE_INT128 
- * 
- * Defined when the compiler supports __int128 extension 
- * 
- * @code 
- * 
- * #if defined(Y_HAVE_INT128) 
- *     __int128 myVeryBigInt = 12345678901234567890; 
- * #endif 
- * 
- * @endcode 
- */ 
-#if defined(__SIZEOF_INT128__) 
+
+/**
+ * @ def Y_HAVE_INT128
+ *
+ * Defined when the compiler supports __int128 extension
+ *
+ * @code
+ *
+ * #if defined(Y_HAVE_INT128)
+ *     __int128 myVeryBigInt = 12345678901234567890;
+ * #endif
+ *
+ * @endcode
+ */
+#if defined(__SIZEOF_INT128__)
     #define Y_HAVE_INT128 1
-#endif 
+#endif
 
 /**
  * XRAY macro must be passed to compiler if XRay is enabled.
diff --git a/util/system/compiler_ut.cpp b/util/system/compiler_ut.cpp
index 5b500e9529..f93b1c0850 100644
--- a/util/system/compiler_ut.cpp
+++ b/util/system/compiler_ut.cpp
@@ -1,24 +1,24 @@
-#include "compiler.h" 
- 
+#include "compiler.h"
+
 #include <library/cpp/testing/unittest/registar.h>
- 
+
 Y_UNIT_TEST_SUITE(TCompilerTest) {
     Y_UNIT_TEST(TestPragmaNoWshadow) {
-        Y_PRAGMA_DIAGNOSTIC_PUSH 
-        Y_PRAGMA_NO_WSHADOW 
- 
-        // define two variables with similar names, latest must shadow first 
-        // and there will be no warning for this 
- 
-        for (int i = 0; i < 1; ++i) { 
-            for (int i = 100500; i < 100501; ++i) { 
-                UNIT_ASSERT_EQUAL(i, 100500); 
-            } 
-        } 
- 
-        Y_PRAGMA_DIAGNOSTIC_POP 
-    } 
- 
+        Y_PRAGMA_DIAGNOSTIC_PUSH
+        Y_PRAGMA_NO_WSHADOW
+
+        // define two variables with similar names, latest must shadow first
+        // and there will be no warning for this
+
+        for (int i = 0; i < 1; ++i) {
+            for (int i = 100500; i < 100501; ++i) {
+                UNIT_ASSERT_EQUAL(i, 100500);
+            }
+        }
+
+        Y_PRAGMA_DIAGNOSTIC_POP
+    }
+
     Y_PRAGMA_DIAGNOSTIC_PUSH
     Y_PRAGMA_NO_UNUSED_PARAMETER
 
@@ -35,38 +35,38 @@ Y_UNIT_TEST_SUITE(TCompilerTest) {
     }
 
     Y_UNIT_TEST(TestHaveInt128) {
-#ifdef Y_HAVE_INT128 
-        // will be compiled without errors 
-        unsigned __int128 a = 1; 
-        __int128 b = 1; 
-        UNIT_ASSERT_EQUAL(a, 1); 
-        UNIT_ASSERT_EQUAL(b, 1); 
-        UNIT_ASSERT_EQUAL(sizeof(a), sizeof(b)); 
- 
-        // and we can set a type alias for __int128 and unsigned __int128 without compiler errors 
-        using TMyInt128 = __int128; 
-        using TMyUnsignedInt128 = unsigned __int128; 
- 
-        TMyInt128 i128value; 
-        TMyUnsignedInt128 ui128value; 
-        Y_UNUSED(i128value); 
-        Y_UNUSED(ui128value); 
- 
-#endif 
-    } 
- 
-    // define deprecated function 
+#ifdef Y_HAVE_INT128
+        // will be compiled without errors
+        unsigned __int128 a = 1;
+        __int128 b = 1;
+        UNIT_ASSERT_EQUAL(a, 1);
+        UNIT_ASSERT_EQUAL(b, 1);
+        UNIT_ASSERT_EQUAL(sizeof(a), sizeof(b));
+
+        // and we can set a type alias for __int128 and unsigned __int128 without compiler errors
+        using TMyInt128 = __int128;
+        using TMyUnsignedInt128 = unsigned __int128;
+
+        TMyInt128 i128value;
+        TMyUnsignedInt128 ui128value;
+        Y_UNUSED(i128value);
+        Y_UNUSED(ui128value);
+
+#endif
+    }
+
+    // define deprecated function
     [[deprecated]] void Bar() {
-        return; 
-    } 
- 
-    Y_UNIT_TEST(TestNoDeprecated) { 
-        Y_PRAGMA_DIAGNOSTIC_PUSH 
-        Y_PRAGMA_NO_DEPRECATED 
- 
-        // will be compiled without errors 
+        return;
+    }
+
+    Y_UNIT_TEST(TestNoDeprecated) {
+        Y_PRAGMA_DIAGNOSTIC_PUSH
+        Y_PRAGMA_NO_DEPRECATED
+
+        // will be compiled without errors
         Bar();
- 
-        Y_PRAGMA_DIAGNOSTIC_POP 
-    } 
-} 
+
+        Y_PRAGMA_DIAGNOSTIC_POP
+    }
+}
diff --git a/util/system/condvar.cpp b/util/system/condvar.cpp
index 707db52c0b..62f3d22356 100644
--- a/util/system/condvar.cpp
+++ b/util/system/condvar.cpp
@@ -27,11 +27,11 @@ namespace {
         using TWaitEvents = TIntrusiveList<TWaitEvent>;
 
     public:
-        inline ~TCondVarImpl() { 
+        inline ~TCondVarImpl() {
             Y_ASSERT(Events_.Empty());
         }
 
-        inline void Signal() noexcept { 
+        inline void Signal() noexcept {
             with_lock (Lock_) {
                 if (!Events_.Empty()) {
                     Events_.PopFront()->Signal();
@@ -39,7 +39,7 @@ namespace {
             }
         }
 
-        inline void BroadCast() noexcept { 
+        inline void BroadCast() noexcept {
             with_lock (Lock_) {
                 //TODO
                 while (!Events_.Empty()) {
@@ -48,7 +48,7 @@ namespace {
             }
         }
 
-        inline bool WaitD(TMutex& m, TInstant deadLine) noexcept { 
+        inline bool WaitD(TMutex& m, TInstant deadLine) noexcept {
             TWaitEvent event;
 
             with_lock (Lock_) {
@@ -86,17 +86,17 @@ public:
         }
     }
 
-    inline ~TImpl() { 
+    inline ~TImpl() {
         int ret = pthread_cond_destroy(&Cond_);
         Y_VERIFY(ret == 0, "pthread_cond_destroy failed: %s", LastSystemErrorText(ret));
     }
 
-    inline void Signal() noexcept { 
+    inline void Signal() noexcept {
         int ret = pthread_cond_signal(&Cond_);
         Y_VERIFY(ret == 0, "pthread_cond_signal failed: %s", LastSystemErrorText(ret));
     }
 
-    inline bool WaitD(TMutex& lock, TInstant deadLine) noexcept { 
+    inline bool WaitD(TMutex& lock, TInstant deadLine) noexcept {
         if (deadLine == TInstant::Max()) {
             int ret = pthread_cond_wait(&Cond_, (pthread_mutex_t*)lock.Handle());
             Y_VERIFY(ret == 0, "pthread_cond_wait failed: %s", LastSystemErrorText(ret));
@@ -117,7 +117,7 @@ public:
         }
     }
 
-    inline void BroadCast() noexcept { 
+    inline void BroadCast() noexcept {
         int ret = pthread_cond_broadcast(&Cond_);
         Y_VERIFY(ret == 0, "pthread_cond_broadcast failed: %s", LastSystemErrorText(ret));
     }
@@ -134,14 +134,14 @@ TCondVar::TCondVar()
 
 TCondVar::~TCondVar() = default;
 
-void TCondVar::BroadCast() noexcept { 
+void TCondVar::BroadCast() noexcept {
     Impl_->BroadCast();
 }
 
-void TCondVar::Signal() noexcept { 
+void TCondVar::Signal() noexcept {
     Impl_->Signal();
 }
 
-bool TCondVar::WaitD(TMutex& mutex, TInstant deadLine) noexcept { 
+bool TCondVar::WaitD(TMutex& mutex, TInstant deadLine) noexcept {
     return Impl_->WaitD(mutex, deadLine);
 }
diff --git a/util/system/condvar.h b/util/system/condvar.h
index b18e48432b..569162717c 100644
--- a/util/system/condvar.h
+++ b/util/system/condvar.h
@@ -11,10 +11,10 @@
 class TCondVar {
 public:
     TCondVar();
-    ~TCondVar(); 
+    ~TCondVar();
 
-    void BroadCast() noexcept; 
-    void Signal() noexcept; 
+    void BroadCast() noexcept;
+    void Signal() noexcept;
 
     /*
      * returns false if failed by timeout
@@ -46,7 +46,7 @@ public:
     /*
      * infinite wait
      */
-    inline void WaitI(TMutex& m) noexcept { 
+    inline void WaitI(TMutex& m) noexcept {
         WaitD(m, TInstant::Max());
     }
 
@@ -56,7 +56,7 @@ public:
     }
 
     //deprecated
-    inline void Wait(TMutex& m) noexcept { 
+    inline void Wait(TMutex& m) noexcept {
         WaitI(m);
     }
 
diff --git a/util/system/context.cpp b/util/system/context.cpp
index 18684e4054..ad99309088 100644
--- a/util/system/context.cpp
+++ b/util/system/context.cpp
@@ -52,7 +52,7 @@ extern "C" void __mylongjmp(__myjmp_buf env, int val) __attribute__((__noreturn_
 extern "C" int __mysetjmp(__myjmp_buf env) __attribute__((__returns_twice__));
 
 namespace {
-    class TStackType { 
+    class TStackType {
     public:
         inline TStackType(TArrayRef<char> range) noexcept
     #if defined(STACK_GROW_DOWN)
@@ -64,14 +64,14 @@ namespace {
             ReAlign();
         }
 
-        inline ~TStackType() = default; 
+        inline ~TStackType() = default;
 
-        inline void ReAlign() noexcept { 
+        inline void ReAlign() noexcept {
             Data_ = AlignStackPtr(Data_);
         }
 
         template <class T>
-        inline void Push(T t) noexcept { 
+        inline void Push(T t) noexcept {
     #if defined(STACK_GROW_DOWN)
             Data_ -= sizeof(T);
             *((T*)Data_) = t;
@@ -81,12 +81,12 @@ namespace {
     #endif
         }
 
-        inline char* StackPtr() noexcept { 
+        inline char* StackPtr() noexcept {
             return Data_;
         }
 
     private:
-        static inline char* AlignStackPtr(char* ptr) noexcept { 
+        static inline char* AlignStackPtr(char* ptr) noexcept {
     #if defined(STACK_GROW_DOWN)
             return AlignDown(ptr, STACK_ALIGN);
     #else
@@ -98,15 +98,15 @@ namespace {
         char* Data_;
     };
 
-    static inline void*& JmpBufReg(__myjmp_buf& buf, size_t n) noexcept { 
+    static inline void*& JmpBufReg(__myjmp_buf& buf, size_t n) noexcept {
         return (((void**)(void*)(buf))[n]);
     }
 
-    static inline void*& JmpBufStackReg(__myjmp_buf& buf) noexcept { 
+    static inline void*& JmpBufStackReg(__myjmp_buf& buf) noexcept {
         return JmpBufReg(buf, STACK_CNT);
     }
 
-    static inline void*& JmpBufProgrReg(__myjmp_buf& buf) noexcept { 
+    static inline void*& JmpBufProgrReg(__myjmp_buf& buf) noexcept {
         return JmpBufReg(buf, PROGR_CNT);
     }
 
@@ -156,7 +156,7 @@ TContMachineContext::TContMachineContext(const TContClosure& c)
     : San_(c)
     #endif
 {
-    TStackType stack(c.Stack); 
+    TStackType stack(c.Stack);
 
     /*
      * arg, and align data
@@ -194,7 +194,7 @@ TContMachineContext::TContMachineContext(const TContClosure& c)
     JmpBufFrameReg(Buf_) = nullptr;
 }
 
-void TContMachineContext::SwitchTo(TContMachineContext* next) noexcept { 
+void TContMachineContext::SwitchTo(TContMachineContext* next) noexcept {
     if (Y_LIKELY(__mysetjmp(Buf_) == 0)) {
     #if defined(_asan_enabled_) || defined(_tsan_enabled_)
         next->San_.BeforeSwitch(&San_);
@@ -231,7 +231,7 @@ TContMachineContext::TContMachineContext(const TContClosure& c)
     Y_ENSURE(Fiber_, TStringBuf("fiber error"));
 }
 
-TContMachineContext::~TContMachineContext() { 
+TContMachineContext::~TContMachineContext() {
     if (MainFiber_) {
         ConvertFiberToThread();
     } else {
@@ -239,7 +239,7 @@ TContMachineContext::~TContMachineContext() {
     }
 }
 
-void TContMachineContext::SwitchTo(TContMachineContext* next) noexcept { 
+void TContMachineContext::SwitchTo(TContMachineContext* next) noexcept {
     SwitchToFiber(next->Fiber_);
 }
 #endif
@@ -262,7 +262,7 @@ struct TContMachineContext::TImpl {
         Thread->Start();
     }
 
-    inline ~TImpl() { 
+    inline ~TImpl() {
         if (Thread) {
             Finish = true;
             Signal();
@@ -270,7 +270,7 @@ struct TContMachineContext::TImpl {
         }
     }
 
-    inline void SwitchTo(TImpl* next) noexcept { 
+    inline void SwitchTo(TImpl* next) noexcept {
         next->Signal();
         Wait();
     }
@@ -286,11 +286,11 @@ struct TContMachineContext::TImpl {
         TL->DoRun();
     }
 
-    inline void Signal() noexcept { 
+    inline void Signal() noexcept {
         Event.Signal();
     }
 
-    inline void Wait() noexcept { 
+    inline void Wait() noexcept {
         Event.Wait();
 
         if (Finish) {
@@ -315,10 +315,10 @@ TContMachineContext::TContMachineContext(const TContClosure& c)
 {
 }
 
-TContMachineContext::~TContMachineContext() { 
+TContMachineContext::~TContMachineContext() {
 }
 
-void TContMachineContext::SwitchTo(TContMachineContext* next) noexcept { 
+void TContMachineContext::SwitchTo(TContMachineContext* next) noexcept {
     Impl_->SwitchTo(next->Impl_.Get());
 }
 #endif
diff --git a/util/system/context.h b/util/system/context.h
index 9f16663f66..d2a349bfc5 100644
--- a/util/system/context.h
+++ b/util/system/context.h
@@ -78,10 +78,10 @@ public:
         makecontext(&Ctx_, (ucontext_func_t)ContextTrampoLine, 1, c.TrampoLine);
     }
 
-    inline ~TContMachineContext() { 
+    inline ~TContMachineContext() {
     }
 
-    inline void SwitchTo(TContMachineContext* next) noexcept { 
+    inline void SwitchTo(TContMachineContext* next) noexcept {
         swapcontext(&Ctx_, &next->Ctx_);
     }
 
@@ -98,9 +98,9 @@ public:
     TContMachineContext();
     TContMachineContext(const TContClosure& c);
 
-    ~TContMachineContext(); 
+    ~TContMachineContext();
 
-    void SwitchTo(TContMachineContext* next) noexcept; 
+    void SwitchTo(TContMachineContext* next) noexcept;
 
 private:
     THolder<TImpl> Impl_;
@@ -112,9 +112,9 @@ class TContMachineContext {
 public:
     TContMachineContext();
     TContMachineContext(const TContClosure& c);
-    ~TContMachineContext(); 
+    ~TContMachineContext();
 
-    void SwitchTo(TContMachineContext* next) noexcept; 
+    void SwitchTo(TContMachineContext* next) noexcept;
 
 private:
     void* Fiber_;
@@ -133,7 +133,7 @@ public:
 
     inline ~TContMachineContext() = default;
 
-    void SwitchTo(TContMachineContext* next) noexcept; 
+    void SwitchTo(TContMachineContext* next) noexcept;
 
 private:
     __myjmp_buf Buf_;
@@ -153,7 +153,7 @@ private:
 };
 #endif
 
-static inline size_t MachineContextSize() noexcept { 
+static inline size_t MachineContextSize() noexcept {
     return sizeof(TContMachineContext);
 }
 
diff --git a/util/system/context_ut.cpp b/util/system/context_ut.cpp
index 1c75718134..45cb0249f7 100644
--- a/util/system/context_ut.cpp
+++ b/util/system/context_ut.cpp
@@ -22,7 +22,7 @@ Y_UNIT_TEST_SUITE(TestContext) {
             char Buf[1000000];
         };
 
-        static TDeque<TW> w; 
+        static TDeque<TW> w;
 
         auto& tw = w.emplace_back(&f);
 
diff --git a/util/system/direct_io.cpp b/util/system/direct_io.cpp
index 532780e835..f59c54b0cb 100644
--- a/util/system/direct_io.cpp
+++ b/util/system/direct_io.cpp
@@ -46,7 +46,7 @@ namespace {
     };
 }
 
-TDirectIOBufferedFile::TDirectIOBufferedFile(const TString& path, EOpenMode oMode, size_t buflen /*= 1 << 17*/) 
+TDirectIOBufferedFile::TDirectIOBufferedFile(const TString& path, EOpenMode oMode, size_t buflen /*= 1 << 17*/)
     : File(path, oMode)
     , Alignment(0)
     , DataLen(0)
diff --git a/util/system/direct_io.h b/util/system/direct_io.h
index 4a9e80f3c7..6a3325a960 100644
--- a/util/system/direct_io.h
+++ b/util/system/direct_io.h
@@ -11,7 +11,7 @@
 // - Supports writing odd sized files by turning off direct IO for the last chunk.
 class TDirectIOBufferedFile {
 public:
-    TDirectIOBufferedFile(const TString& path, EOpenMode oMode, size_t buflen = 1 << 17); 
+    TDirectIOBufferedFile(const TString& path, EOpenMode oMode, size_t buflen = 1 << 17);
     ~TDirectIOBufferedFile();
 
     void FlushData();
diff --git a/util/system/direct_io_ut.cpp b/util/system/direct_io_ut.cpp
index 8293cc3573..839c3de7ca 100644
--- a/util/system/direct_io_ut.cpp
+++ b/util/system/direct_io_ut.cpp
@@ -12,7 +12,7 @@ static const char* FileName_("./test.file");
 Y_UNIT_TEST_SUITE(TDirectIoTestSuite) {
     Y_UNIT_TEST(TestDirectFile) {
         TDirectIOBufferedFile file(FileName_, RdWr | Direct | Seq | CreateAlways, 1 << 15);
-        TVector<ui64> data((1 << 15) + 1); 
+        TVector<ui64> data((1 << 15) + 1);
         TVector<ui64> readResult(data.size());
         for (auto& i : data) {
             i = RandomNumber<ui64>();
diff --git a/util/system/dynlib.cpp b/util/system/dynlib.cpp
index 7a3a2d4a29..9d2541c25f 100644
--- a/util/system/dynlib.cpp
+++ b/util/system/dynlib.cpp
@@ -25,7 +25,7 @@ using HINSTANCE = void*;
     #define DLLSYM(hndl, name) dlsym(hndl, name)
 #endif
 
-inline TString DLLERR() { 
+inline TString DLLERR() {
 #ifdef _unix_
     return dlerror();
 #endif
@@ -38,7 +38,7 @@ inline TString DLLERR() {
         return "DLLERR() unknown error";
     while (cnt && isspace(msg[cnt - 1]))
         --cnt;
-    TString err(msg, 0, cnt); 
+    TString err(msg, 0, cnt);
     LocalFree(msg);
     return err;
 #endif
@@ -67,13 +67,13 @@ public:
         return new TImpl(path, flags);
     }
 
-    inline ~TImpl() { 
+    inline ~TImpl() {
         if (Module && Unloadable) {
             DLLCLOSE(Module);
         }
     }
 
-    inline void* SymOptional(const char* name) noexcept { 
+    inline void* SymOptional(const char* name) noexcept {
         return (void*)DLLSYM(Module, name);
     }
 
@@ -96,10 +96,10 @@ private:
     bool Unloadable;
 };
 
-TDynamicLibrary::TDynamicLibrary() noexcept { 
+TDynamicLibrary::TDynamicLibrary() noexcept {
 }
 
-TDynamicLibrary::TDynamicLibrary(const TString& path, int flags) { 
+TDynamicLibrary::TDynamicLibrary(const TString& path, int flags) {
     Open(path.data(), flags);
 }
 
@@ -109,11 +109,11 @@ void TDynamicLibrary::Open(const char* path, int flags) {
     Impl_.Reset(TImpl::SafeCreate(path, flags));
 }
 
-void TDynamicLibrary::Close() noexcept { 
+void TDynamicLibrary::Close() noexcept {
     Impl_.Destroy();
 }
 
-void* TDynamicLibrary::SymOptional(const char* name) noexcept { 
+void* TDynamicLibrary::SymOptional(const char* name) noexcept {
     if (!IsLoaded()) {
         return nullptr;
     }
@@ -129,7 +129,7 @@ void* TDynamicLibrary::Sym(const char* name) {
     return Impl_->Sym(name);
 }
 
-bool TDynamicLibrary::IsLoaded() const noexcept { 
+bool TDynamicLibrary::IsLoaded() const noexcept {
     return (bool)Impl_.Get();
 }
 
diff --git a/util/system/dynlib.h b/util/system/dynlib.h
index 6c4a1b0dd5..66eaf4a5c1 100644
--- a/util/system/dynlib.h
+++ b/util/system/dynlib.h
@@ -3,7 +3,7 @@
 #include "defaults.h"
 
 #include <util/generic/ptr.h>
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 
 #define Y_GET_FUNC(dll, name) FUNC_##name((dll).Sym(#name))
 #define Y_GET_FUNC_OPTIONAL(dll, name) FUNC_##name((dll).SymOptional(#name))
@@ -22,15 +22,15 @@
 
 class TDynamicLibrary {
 public:
-    TDynamicLibrary() noexcept; 
-    TDynamicLibrary(const TString& path, int flags = DEFAULT_DLLOPEN_FLAGS); 
-    ~TDynamicLibrary(); 
+    TDynamicLibrary() noexcept;
+    TDynamicLibrary(const TString& path, int flags = DEFAULT_DLLOPEN_FLAGS);
+    ~TDynamicLibrary();
 
     void Open(const char* path, int flags = DEFAULT_DLLOPEN_FLAGS);
-    void Close() noexcept; 
-    void* SymOptional(const char* name) noexcept; 
+    void Close() noexcept;
+    void* SymOptional(const char* name) noexcept;
     void* Sym(const char* name);
-    bool IsLoaded() const noexcept; 
+    bool IsLoaded() const noexcept;
     void SetUnloadable(bool unloadable); // Set to false to avoid unloading on destructor
 
 private:
@@ -44,11 +44,11 @@ class TExternalSymbol {
 private:
     TLib* PLib;
     TDynamicLibrary* DLib;
-    TString lname; 
-    TString vname; 
+    TString lname;
+    TString vname;
 
 public:
-    TExternalSymbol() noexcept { 
+    TExternalSymbol() noexcept {
         PLib = nullptr;
         DLib = nullptr;
     }
@@ -70,7 +70,7 @@ public:
         }
         return *this;
     }
-    ~TExternalSymbol() { 
+    ~TExternalSymbol() {
         delete DLib;
     }
     // set the symbol from dynamic source
@@ -90,30 +90,30 @@ public:
         vname = vtbl_name;
     }
     // set the symbol from static source
-    void SetSym(TLib* pl) noexcept { 
+    void SetSym(TLib* pl) noexcept {
         if (DLib == nullptr && PLib == nullptr)
             PLib = pl;
     }
-    void Close() noexcept { 
+    void Close() noexcept {
         delete DLib;
         DLib = 0;
         PLib = 0;
         lname.remove();
         vname.remove();
     }
-    TLib* Symbol() const noexcept { 
+    TLib* Symbol() const noexcept {
         return PLib;
     }
-    const TString& LibName() const noexcept { 
+    const TString& LibName() const noexcept {
         return lname;
     }
-    const TString& VtblName() const noexcept { 
+    const TString& VtblName() const noexcept {
         return vname;
     }
-    bool IsStatic() const noexcept { 
+    bool IsStatic() const noexcept {
         return DLib == nullptr && PLib != nullptr;
     }
-    bool IsDynamic() const noexcept { 
+    bool IsDynamic() const noexcept {
         return DLib && DLib->IsLoaded() && PLib != nullptr;
     }
 };
diff --git a/util/system/env.cpp b/util/system/env.cpp
index 779aa6e4fb..ead9b566a5 100644
--- a/util/system/env.cpp
+++ b/util/system/env.cpp
@@ -1,19 +1,19 @@
 #include "env.h"
 
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 #include <util/generic/yexception.h>
 
 #ifdef _win_
     #include <util/generic/vector.h>
     #include "winint.h"
-#else 
+#else
     #include <cerrno>
     #include <cstdlib>
 #endif
 
 /**
- * On Windows there may be many copies of enviroment variables, there at least two known, one is 
- * manipulated by Win32 API, another by C runtime, so we must be consistent in the choice of 
+ * On Windows there may be many copies of enviroment variables, there at least two known, one is
+ * manipulated by Win32 API, another by C runtime, so we must be consistent in the choice of
  * functions used to manipulate them.
  *
  * Relevant links:
@@ -21,35 +21,35 @@
  *  - https://a.yandex-team.ru/review/108892/details
  */
 
-TString GetEnv(const TString& key, const TString& def) { 
+TString GetEnv(const TString& key, const TString& def) {
 #ifdef _win_
     size_t len = GetEnvironmentVariableA(key.data(), nullptr, 0);
- 
-    if (len == 0) { 
+
+    if (len == 0) {
         if (GetLastError() == ERROR_ENVVAR_NOT_FOUND) {
             return def;
         }
-        return TString{}; 
-    } 
- 
-    TVector<char> buffer(len); 
-    size_t bufferSize; 
-    do { 
-        bufferSize = buffer.size(); 
+        return TString{};
+    }
+
+    TVector<char> buffer(len);
+    size_t bufferSize;
+    do {
+        bufferSize = buffer.size();
         len = GetEnvironmentVariableA(key.data(), buffer.data(), static_cast<DWORD>(bufferSize));
-        if (len > bufferSize) { 
-            buffer.resize(len); 
-        } 
-    } while (len > bufferSize); 
- 
-    return TString(buffer.data(), len); 
+        if (len > bufferSize) {
+            buffer.resize(len);
+        }
+    } while (len > bufferSize);
+
+    return TString(buffer.data(), len);
 #else
     const char* env = getenv(key.data());
-    return env ? TString(env) : def; 
+    return env ? TString(env) : def;
 #endif
 }
 
-void SetEnv(const TString& key, const TString& value) { 
+void SetEnv(const TString& key, const TString& value) {
     bool isOk = false;
     int errorCode = 0;
 #ifdef _win_
diff --git a/util/system/env.h b/util/system/env.h
index 0b77070ab7..e2ccdd1e95 100644
--- a/util/system/env.h
+++ b/util/system/env.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 
 /**
  * Search the environment list provided by the host environment for associated variable.
@@ -16,7 +16,7 @@
  * @note        Calls to `GetEnv` and `SetEnv` from different threads must be synchronized.
  * @see         SetEnv
  */
-TString GetEnv(const TString& key, const TString& def = TString()); 
+TString GetEnv(const TString& key, const TString& def = TString());
 
 /**
  * Add or change environment variable provided by the host environment.
@@ -29,4 +29,4 @@ TString GetEnv(const TString& key, const TString& def = TString());
  * @note        Calls to `GetEnv` and `SetEnv` from different threads must be synchronized.
  * @see         GetEnv
  */
-void SetEnv(const TString& key, const TString& value); 
+void SetEnv(const TString& key, const TString& value);
diff --git a/util/system/env_ut.cpp b/util/system/env_ut.cpp
index 3139394bc7..e03cc01658 100644
--- a/util/system/env_ut.cpp
+++ b/util/system/env_ut.cpp
@@ -1,31 +1,31 @@
 #include <library/cpp/testing/unittest/registar.h>
 
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 #include "env.h"
 
 Y_UNIT_TEST_SUITE(EnvTest) {
     Y_UNIT_TEST(GetSetEnvTest) {
-        TString key = "util_GETENV_TestVar"; 
-        TString value = "Some value for env var"; 
-        TString def = "Some default value for env var"; 
+        TString key = "util_GETENV_TestVar";
+        TString value = "Some value for env var";
+        TString def = "Some default value for env var";
         // first of all, it should be clear
-        UNIT_ASSERT_VALUES_EQUAL(GetEnv(key), TString()); 
+        UNIT_ASSERT_VALUES_EQUAL(GetEnv(key), TString());
         UNIT_ASSERT_VALUES_EQUAL(GetEnv(key, def), def);
         SetEnv(key, value);
         // set and see what value we get here
         UNIT_ASSERT_VALUES_EQUAL(GetEnv(key), value);
         UNIT_ASSERT_VALUES_EQUAL(GetEnv(key, def), value);
         // set empty value
-        SetEnv(key, TString()); 
-        UNIT_ASSERT_VALUES_EQUAL(GetEnv(key), TString()); 
- 
-        // check for long values, see IGNIETFERRO-214 
-        TString longKey = "util_GETENV_TestVarLong"; 
-        TString longValue{1500, 't'}; 
-        UNIT_ASSERT_VALUES_EQUAL(GetEnv(longKey), TString()); 
-        SetEnv(longKey, longValue); 
-        UNIT_ASSERT_VALUES_EQUAL(GetEnv(longKey), longValue); 
-        SetEnv(longKey, TString()); 
-        UNIT_ASSERT_VALUES_EQUAL(GetEnv(longKey), TString()); 
+        SetEnv(key, TString());
+        UNIT_ASSERT_VALUES_EQUAL(GetEnv(key), TString());
+
+        // check for long values, see IGNIETFERRO-214
+        TString longKey = "util_GETENV_TestVarLong";
+        TString longValue{1500, 't'};
+        UNIT_ASSERT_VALUES_EQUAL(GetEnv(longKey), TString());
+        SetEnv(longKey, longValue);
+        UNIT_ASSERT_VALUES_EQUAL(GetEnv(longKey), longValue);
+        SetEnv(longKey, TString());
+        UNIT_ASSERT_VALUES_EQUAL(GetEnv(longKey), TString());
     }
 }
diff --git a/util/system/error.cpp b/util/system/error.cpp
index eb0806fe5d..f778ec42cb 100644
--- a/util/system/error.cpp
+++ b/util/system/error.cpp
@@ -47,7 +47,7 @@ int LastSystemError() {
 #if defined(_win_)
 namespace {
     struct TErrString {
-        inline TErrString() noexcept { 
+        inline TErrString() noexcept {
             data[0] = 0;
         }
 
diff --git a/util/system/event.cpp b/util/system/event.cpp
index 6f70a37e05..79b3cdb291 100644
--- a/util/system/event.cpp
+++ b/util/system/event.cpp
@@ -19,19 +19,19 @@ public:
         cond = CreateEvent(nullptr, rmode == rManual ? true : false, false, nullptr);
     }
 
-    inline ~TEvImpl() { 
+    inline ~TEvImpl() {
         CloseHandle(cond);
     }
 
-    inline void Reset() noexcept { 
+    inline void Reset() noexcept {
         ResetEvent(cond);
     }
 
-    inline void Signal() noexcept { 
+    inline void Signal() noexcept {
         SetEvent(cond);
     }
 
-    inline bool WaitD(TInstant deadLine) noexcept { 
+    inline bool WaitD(TInstant deadLine) noexcept {
         if (deadLine == TInstant::Max()) {
             return WaitForSingleObject(cond, INFINITE) == WAIT_OBJECT_0;
         }
@@ -51,7 +51,7 @@ public:
     {
     }
 
-    inline void Signal() noexcept { 
+    inline void Signal() noexcept {
         if (Manual && AtomicGet(Signaled)) {
             return; // shortcut
         }
@@ -67,11 +67,11 @@ public:
         }
     }
 
-    inline void Reset() noexcept { 
+    inline void Reset() noexcept {
         AtomicSet(Signaled, 0);
     }
 
-    inline bool WaitD(TInstant deadLine) noexcept { 
+    inline bool WaitD(TInstant deadLine) noexcept {
         if (Manual && AtomicGet(Signaled)) {
             return true; // shortcut
         }
diff --git a/util/system/event.h b/util/system/event.h
index 3e9378fbee..cab2fc478a 100644
--- a/util/system/event.h
+++ b/util/system/event.h
@@ -24,34 +24,34 @@ public:
 
     ~TSystemEvent();
 
-    void Reset() noexcept; 
-    void Signal() noexcept; 
+    void Reset() noexcept;
+    void Signal() noexcept;
 
     /*
      * return true if signaled, false if timed out.
      */
-    bool WaitD(TInstant deadLine) noexcept; 
+    bool WaitD(TInstant deadLine) noexcept;
 
     /*
      * return true if signaled, false if timed out.
      */
-    inline bool WaitT(TDuration timeOut) noexcept { 
+    inline bool WaitT(TDuration timeOut) noexcept {
         return WaitD(timeOut.ToDeadLine());
     }
 
     /*
      * wait infinite time
      */
-    inline void WaitI() noexcept { 
+    inline void WaitI() noexcept {
         WaitD(TInstant::Max());
     }
 
     //return true if signaled, false if timed out.
-    inline bool Wait(ui32 timer) noexcept { 
+    inline bool Wait(ui32 timer) noexcept {
         return WaitT(TDuration::MilliSeconds(timer));
     }
 
-    inline bool Wait() noexcept { 
+    inline bool Wait() noexcept {
         WaitI();
 
         return true;
diff --git a/util/system/execpath.cpp b/util/system/execpath.cpp
index 3877c912e7..33198af58b 100644
--- a/util/system/execpath.cpp
+++ b/util/system/execpath.cpp
@@ -32,8 +32,8 @@
 #include "fs.h"
 
 #if defined(_freebsd_)
-static inline bool GoodPath(const TString& path) { 
-    return path.find('/') != TString::npos; 
+static inline bool GoodPath(const TString& path) {
+    return path.find('/') != TString::npos;
 }
 
 static inline int FreeBSDSysCtl(int* mib, size_t mibSize, TTempBuf& res) {
@@ -51,12 +51,12 @@ static inline int FreeBSDSysCtl(int* mib, size_t mibSize, TTempBuf& res) {
     return errno;
 }
 
-static inline TString FreeBSDGetExecPath() { 
+static inline TString FreeBSDGetExecPath() {
     int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};
     TTempBuf buf;
     int r = FreeBSDSysCtl(mib, Y_ARRAY_SIZE(mib), buf);
     if (r == 0) {
-        return TString(buf.Data(), buf.Filled() - 1); 
+        return TString(buf.Data(), buf.Filled() - 1);
     } else if (r == ENOTSUP) { // older FreeBSD version
         /*
          * BSD analogue for /proc/self is /proc/curproc.
@@ -66,24 +66,24 @@ static inline TString FreeBSDGetExecPath() {
         TString path("/proc/curproc/file");
         return NFs::ReadLink(path);
     } else {
-        return TString(); 
+        return TString();
     }
 }
 
-static inline TString FreeBSDGetArgv0() { 
+static inline TString FreeBSDGetArgv0() {
     int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_ARGS, getpid()};
     TTempBuf buf;
     int r = FreeBSDSysCtl(mib, Y_ARRAY_SIZE(mib), buf);
     if (r == 0) {
-        return TString(buf.Data()); 
+        return TString(buf.Data());
     } else if (r == ENOTSUP) {
-        return TString(); 
+        return TString();
     } else {
         ythrow yexception() << "FreeBSDGetArgv0() failed: " << LastSystemErrorText();
     }
 }
 
-static inline bool FreeBSDGuessExecPath(const TString& guessPath, TString& execPath) { 
+static inline bool FreeBSDGuessExecPath(const TString& guessPath, TString& execPath) {
     if (NFs::Exists(guessPath)) {
         // now it should work for real
         execPath = FreeBSDGetExecPath();
@@ -94,13 +94,13 @@ static inline bool FreeBSDGuessExecPath(const TString& guessPath, TString& execP
     return false;
 }
 
-static inline bool FreeBSDGuessExecBasePath(const TString& guessBasePath, TString& execPath) { 
-    return FreeBSDGuessExecPath(TString(guessBasePath) + "/" + getprogname(), execPath); 
+static inline bool FreeBSDGuessExecBasePath(const TString& guessBasePath, TString& execPath) {
+    return FreeBSDGuessExecPath(TString(guessBasePath) + "/" + getprogname(), execPath);
 }
 
 #endif
 
-static TString GetExecPathImpl() { 
+static TString GetExecPathImpl() {
 #if defined(_solaris_)
     return execname();
 #elif defined(_darwin_)
@@ -132,7 +132,7 @@ static TString GetExecPathImpl() {
     return NFs::ReadLink(path);
 // TODO(yoda): check if the filename ends with " (deleted)"
 #elif defined(_freebsd_)
-    TString execPath = FreeBSDGetExecPath(); 
+    TString execPath = FreeBSDGetExecPath();
     if (GoodPath(execPath)) {
         return execPath;
     }
@@ -185,12 +185,12 @@ namespace {
             return SingletonWithPriority<TExecPathsHolder, 1>();
         }
 
-        TString ExecPath; 
+        TString ExecPath;
         TString PersistentExecPath;
     };
 }
 
-const TString& GetExecPath() { 
+const TString& GetExecPath() {
     return TExecPathsHolder::Instance()->ExecPath;
 }
 
diff --git a/util/system/execpath.h b/util/system/execpath.h
index 451551ac79..4b914b8e85 100644
--- a/util/system/execpath.h
+++ b/util/system/execpath.h
@@ -3,7 +3,7 @@
 #include <util/generic/fwd.h>
 
 // NOTE: This function has rare sporadic failures (throws exceptions) on FreeBSD. See REVIEW:54297
-const TString& GetExecPath(); 
+const TString& GetExecPath();
 
 /**
  * Get openable path to the binary currently being executed.
diff --git a/util/system/execpath_ut.cpp b/util/system/execpath_ut.cpp
index df64d08e2f..16b01466f5 100644
--- a/util/system/execpath_ut.cpp
+++ b/util/system/execpath_ut.cpp
@@ -7,7 +7,7 @@
 
 Y_UNIT_TEST_SUITE(TExecPathTest) {
     Y_UNIT_TEST(TestIt) {
-        TString execPath = GetExecPath(); 
+        TString execPath = GetExecPath();
         TString persistentExecPath = GetPersistentExecPath();
 
         try {
diff --git a/util/system/fasttime.cpp b/util/system/fasttime.cpp
index d885592a81..057a814f0a 100644
--- a/util/system/fasttime.cpp
+++ b/util/system/fasttime.cpp
@@ -130,35 +130,35 @@ namespace {
         {
         }
 
-        inline void Add(const A& a, const B& b) noexcept { 
+        inline void Add(const A& a, const B& b) noexcept {
             Add(TSample(a, b));
         }
 
-        inline void Add(const TSample& s) noexcept { 
+        inline void Add(const TSample& s) noexcept {
             S_[(C_++) % N] = s;
             if (C_ > 1) {
                 ReCalc();
             }
         }
 
-        inline B Predict(A a) const noexcept { 
+        inline B Predict(A a) const noexcept {
             return A_ + a * B_;
         }
 
-        inline size_t Size() const noexcept { 
+        inline size_t Size() const noexcept {
             return C_;
         }
 
-        inline bool Enough() const noexcept { 
+        inline bool Enough() const noexcept {
             return Size() >= N;
         }
 
-        inline A LastX() const noexcept { 
+        inline A LastX() const noexcept {
             return S_[(C_ - 1) % N].first;
         }
 
     private:
-        inline void ReCalc() noexcept { 
+        inline void ReCalc() noexcept {
             const size_t n = Min(N, C_);
 
             double sx = 0;
diff --git a/util/system/file.cpp b/util/system/file.cpp
index e4af4bacde..4a261d020c 100644
--- a/util/system/file.cpp
+++ b/util/system/file.cpp
@@ -17,7 +17,7 @@
 #include <util/random/random.h>
 
 #include <util/generic/size_literals.h>
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 #include <util/generic/ylimits.h>
 #include <util/generic/yexception.h>
 
@@ -63,7 +63,7 @@ static bool IsStupidFlagCombination(EOpenMode oMode) {
     return (oMode & (CreateAlways | ForAppend)) == (CreateAlways | ForAppend) || (oMode & (TruncExisting | ForAppend)) == (TruncExisting | ForAppend) || (oMode & (CreateNew | ForAppend)) == (CreateNew | ForAppend);
 }
 
-TFileHandle::TFileHandle(const TString& fName, EOpenMode oMode) noexcept { 
+TFileHandle::TFileHandle(const TString& fName, EOpenMode oMode) noexcept {
     ui32 fcMode = 0;
     EOpenMode createMode = oMode & MaskCreation;
     Y_VERIFY(!IsStupidFlagCombination(oMode), "oMode %d makes no sense", static_cast<int>(oMode));
@@ -267,7 +267,7 @@ TFileHandle::TFileHandle(const TString& fName, EOpenMode oMode) noexcept {
 #endif
 }
 
-bool TFileHandle::Close() noexcept { 
+bool TFileHandle::Close() noexcept {
     bool isOk = true;
 #ifdef _win_
     if (Fd_ != INVALID_FHANDLE) {
@@ -294,7 +294,7 @@ bool TFileHandle::Close() noexcept {
     return isOk;
 }
 
-static inline i64 DoSeek(FHANDLE h, i64 offset, SeekDir origin) noexcept { 
+static inline i64 DoSeek(FHANDLE h, i64 offset, SeekDir origin) noexcept {
     if (h == INVALID_FHANDLE) {
         return -1L;
     }
@@ -319,15 +319,15 @@ static inline i64 DoSeek(FHANDLE h, i64 offset, SeekDir origin) noexcept {
 #endif
 }
 
-i64 TFileHandle::GetPosition() const noexcept { 
+i64 TFileHandle::GetPosition() const noexcept {
     return DoSeek(Fd_, 0, sCur);
 }
 
-i64 TFileHandle::Seek(i64 offset, SeekDir origin) noexcept { 
+i64 TFileHandle::Seek(i64 offset, SeekDir origin) noexcept {
     return DoSeek(Fd_, offset, origin);
 }
 
-i64 TFileHandle::GetLength() const noexcept { 
+i64 TFileHandle::GetLength() const noexcept {
     // XXX: returns error code, but does not set errno
     if (!IsOpen()) {
         return -1L;
@@ -335,7 +335,7 @@ i64 TFileHandle::GetLength() const noexcept {
     return GetFileLength(Fd_);
 }
 
-bool TFileHandle::Resize(i64 length) noexcept { 
+bool TFileHandle::Resize(i64 length) noexcept {
     if (!IsOpen()) {
         return false;
     }
@@ -363,7 +363,7 @@ bool TFileHandle::Resize(i64 length) noexcept {
 #endif
 }
 
-bool TFileHandle::Reserve(i64 length) noexcept { 
+bool TFileHandle::Reserve(i64 length) noexcept {
     // FIXME this should reserve disk space with fallocate
     if (!IsOpen()) {
         return false;
@@ -412,7 +412,7 @@ bool TFileHandle::ShrinkToFit() noexcept {
 #endif
 }
 
-bool TFileHandle::Flush() noexcept { 
+bool TFileHandle::Flush() noexcept {
     if (!IsOpen()) {
         return false;
     }
@@ -443,7 +443,7 @@ bool TFileHandle::Flush() noexcept {
 #endif
 }
 
-bool TFileHandle::FlushData() noexcept { 
+bool TFileHandle::FlushData() noexcept {
 #if defined(_linux_)
     if (!IsOpen()) {
         return false;
@@ -458,7 +458,7 @@ bool TFileHandle::FlushData() noexcept {
 #endif
 }
 
-i32 TFileHandle::Read(void* buffer, ui32 byteCount) noexcept { 
+i32 TFileHandle::Read(void* buffer, ui32 byteCount) noexcept {
     // FIXME size and return must be 64-bit
     if (!IsOpen()) {
         return -1;
@@ -480,7 +480,7 @@ i32 TFileHandle::Read(void* buffer, ui32 byteCount) noexcept {
 #endif
 }
 
-i32 TFileHandle::Write(const void* buffer, ui32 byteCount) noexcept { 
+i32 TFileHandle::Write(const void* buffer, ui32 byteCount) noexcept {
     if (!IsOpen()) {
         return -1;
     }
@@ -501,7 +501,7 @@ i32 TFileHandle::Write(const void* buffer, ui32 byteCount) noexcept {
 #endif
 }
 
-i32 TFileHandle::Pread(void* buffer, ui32 byteCount, i64 offset) const noexcept { 
+i32 TFileHandle::Pread(void* buffer, ui32 byteCount, i64 offset) const noexcept {
 #if defined(_win_)
     OVERLAPPED io;
     Zero(io);
@@ -526,7 +526,7 @@ i32 TFileHandle::Pread(void* buffer, ui32 byteCount, i64 offset) const noexcept
 #endif
 }
 
-i32 TFileHandle::Pwrite(const void* buffer, ui32 byteCount, i64 offset) const noexcept { 
+i32 TFileHandle::Pwrite(const void* buffer, ui32 byteCount, i64 offset) const noexcept {
 #if defined(_win_)
     OVERLAPPED io;
     Zero(io);
@@ -548,7 +548,7 @@ i32 TFileHandle::Pwrite(const void* buffer, ui32 byteCount, i64 offset) const no
 #endif
 }
 
-FHANDLE TFileHandle::Duplicate() const noexcept { 
+FHANDLE TFileHandle::Duplicate() const noexcept {
     if (!IsOpen()) {
         return INVALID_FHANDLE;
     }
@@ -597,7 +597,7 @@ int TFileHandle::Duplicate2Posix(int dstHandle) const noexcept {
 #endif
 }
 
-bool TFileHandle::LinkTo(const TFileHandle& fh) const noexcept { 
+bool TFileHandle::LinkTo(const TFileHandle& fh) const noexcept {
 #if defined(_unix_)
     while (dup2(fh.Fd_, Fd_) == -1) {
         if (errno != EINTR) {
@@ -621,7 +621,7 @@ bool TFileHandle::LinkTo(const TFileHandle& fh) const noexcept {
 #endif
 }
 
-int TFileHandle::Flock(int op) noexcept { 
+int TFileHandle::Flock(int op) noexcept {
     return ::Flock(Fd_, op);
 }
 
@@ -775,7 +775,7 @@ bool TFileHandle::FlushCache(i64 offset, i64 length, bool wait) noexcept {
 #endif
 }
 
-TString DecodeOpenMode(ui32 mode0) { 
+TString DecodeOpenMode(ui32 mode0) {
     ui32 mode = mode0;
 
     TStringBuilder r;
@@ -843,13 +843,13 @@ TString DecodeOpenMode(ui32 mode0) {
 
 class TFile::TImpl: public TAtomicRefCount<TImpl> {
 public:
-    inline TImpl(FHANDLE fd, const TString& fname = TString()) 
+    inline TImpl(FHANDLE fd, const TString& fname = TString())
         : Handle_(fd)
         , FileName_(fname)
     {
     }
 
-    inline TImpl(const TString& fName, EOpenMode oMode) 
+    inline TImpl(const TString& fName, EOpenMode oMode)
         : Handle_(fName, oMode)
         , FileName_(fName)
     {
@@ -866,15 +866,15 @@ public:
         }
     }
 
-    const TString& GetName() const noexcept { 
+    const TString& GetName() const noexcept {
         return FileName_;
     }
 
-    void SetName(const TString& newName) { 
+    void SetName(const TString& newName) {
         FileName_ = newName;
     }
 
-    const TFileHandle& GetHandle() const noexcept { 
+    const TFileHandle& GetHandle() const noexcept {
         return Handle_;
     }
 
@@ -1084,7 +1084,7 @@ public:
 
 private:
     TFileHandle Handle_;
-    TString FileName_; 
+    TString FileName_;
 };
 
 TFile::TFile()
@@ -1097,12 +1097,12 @@ TFile::TFile(FHANDLE fd)
 {
 }
 
-TFile::TFile(FHANDLE fd, const TString& name) 
+TFile::TFile(FHANDLE fd, const TString& name)
     : Impl_(new TImpl(fd, name))
 {
 }
 
-TFile::TFile(const TString& fName, EOpenMode oMode) 
+TFile::TFile(const TString& fName, EOpenMode oMode)
     : Impl_(new TImpl(fName, oMode))
 {
 }
@@ -1113,23 +1113,23 @@ void TFile::Close() {
     Impl_->Close();
 }
 
-const TString& TFile::GetName() const noexcept { 
+const TString& TFile::GetName() const noexcept {
     return Impl_->GetName();
 }
 
-i64 TFile::GetPosition() const noexcept { 
+i64 TFile::GetPosition() const noexcept {
     return Impl_->GetHandle().GetPosition();
 }
 
-i64 TFile::GetLength() const noexcept { 
+i64 TFile::GetLength() const noexcept {
     return Impl_->GetHandle().GetLength();
 }
 
-bool TFile::IsOpen() const noexcept { 
+bool TFile::IsOpen() const noexcept {
     return Impl_->GetHandle().IsOpen();
 }
 
-FHANDLE TFile::GetHandle() const noexcept { 
+FHANDLE TFile::GetHandle() const noexcept {
     return Impl_->GetHandle();
 }
 
@@ -1237,12 +1237,12 @@ void TFile::LinkTo(const TFile& f) const {
     }
 }
 
-TFile TFile::Temporary(const TString& prefix) { 
+TFile TFile::Temporary(const TString& prefix) {
     //TODO - handle impossible case of name collision
     return TFile(prefix + ToString(MicroSeconds()) + "-" + ToString(RandomNumber<ui64>()), CreateNew | RdWr | Seq | Temp | Transient);
 }
 
-TFile TFile::ForAppend(const TString& path) { 
+TFile TFile::ForAppend(const TString& path) {
     return TFile(path, OpenAlways | WrOnly | Seq | ::ForAppend);
 }
 
@@ -1283,7 +1283,7 @@ TFile Duplicate(int fd) {
 #endif
 }
 
-bool PosixDisableReadAhead(FHANDLE fileHandle, void* addr) noexcept { 
+bool PosixDisableReadAhead(FHANDLE fileHandle, void* addr) noexcept {
     int ret = -1;
 
 #if HAVE_POSIX_FADVISE
diff --git a/util/system/file.h b/util/system/file.h
index efe1e59b4a..9502e159b6 100644
--- a/util/system/file.h
+++ b/util/system/file.h
@@ -52,7 +52,7 @@ enum EOpenModeFlag {
 Y_DECLARE_FLAGS(EOpenMode, EOpenModeFlag)
 Y_DECLARE_OPERATORS_FOR_FLAGS(EOpenMode)
 
-TString DecodeOpenMode(ui32 openMode); 
+TString DecodeOpenMode(ui32 openMode);
 
 enum SeekDir {
     sSet = 0,
@@ -62,68 +62,68 @@ enum SeekDir {
 
 class TFileHandle: public TNonCopyable {
 public:
-    constexpr TFileHandle() = default; 
- 
+    constexpr TFileHandle() = default;
+
     /// Warning: takes ownership of fd, so closes it in destructor.
-    inline TFileHandle(FHANDLE fd) noexcept 
+    inline TFileHandle(FHANDLE fd) noexcept
         : Fd_(fd)
     {
     }
 
-    inline TFileHandle(TFileHandle&& other) noexcept 
+    inline TFileHandle(TFileHandle&& other) noexcept
         : Fd_(other.Fd_)
     {
         other.Fd_ = INVALID_FHANDLE;
     }
 
-    TFileHandle(const TString& fName, EOpenMode oMode) noexcept; 
+    TFileHandle(const TString& fName, EOpenMode oMode) noexcept;
 
-    inline ~TFileHandle() { 
+    inline ~TFileHandle() {
         Close();
     }
 
-    bool Close() noexcept; 
+    bool Close() noexcept;
 
-    inline FHANDLE Release() noexcept { 
+    inline FHANDLE Release() noexcept {
         FHANDLE ret = Fd_;
         Fd_ = INVALID_FHANDLE;
         return ret;
     }
 
-    inline void Swap(TFileHandle& r) noexcept { 
+    inline void Swap(TFileHandle& r) noexcept {
         DoSwap(Fd_, r.Fd_);
     }
 
-    inline operator FHANDLE() const noexcept { 
+    inline operator FHANDLE() const noexcept {
         return Fd_;
     }
 
-    inline bool IsOpen() const noexcept { 
+    inline bool IsOpen() const noexcept {
         return Fd_ != INVALID_FHANDLE;
     }
 
-    i64 GetPosition() const noexcept; 
-    i64 GetLength() const noexcept; 
+    i64 GetPosition() const noexcept;
+    i64 GetLength() const noexcept;
 
-    i64 Seek(i64 offset, SeekDir origin) noexcept; 
-    bool Resize(i64 length) noexcept; 
-    bool Reserve(i64 length) noexcept; 
+    i64 Seek(i64 offset, SeekDir origin) noexcept;
+    bool Resize(i64 length) noexcept;
+    bool Reserve(i64 length) noexcept;
     bool FallocateNoResize(i64 length) noexcept;
     bool ShrinkToFit() noexcept;
-    bool Flush() noexcept; 
+    bool Flush() noexcept;
     //flush data only, without file metadata
-    bool FlushData() noexcept; 
-    i32 Read(void* buffer, ui32 byteCount) noexcept; 
-    i32 Write(const void* buffer, ui32 byteCount) noexcept; 
-    i32 Pread(void* buffer, ui32 byteCount, i64 offset) const noexcept; 
-    i32 Pwrite(const void* buffer, ui32 byteCount, i64 offset) const noexcept; 
-    int Flock(int op) noexcept; 
-
-    FHANDLE Duplicate() const noexcept; 
+    bool FlushData() noexcept;
+    i32 Read(void* buffer, ui32 byteCount) noexcept;
+    i32 Write(const void* buffer, ui32 byteCount) noexcept;
+    i32 Pread(void* buffer, ui32 byteCount, i64 offset) const noexcept;
+    i32 Pwrite(const void* buffer, ui32 byteCount, i64 offset) const noexcept;
+    int Flock(int op) noexcept;
+
+    FHANDLE Duplicate() const noexcept;
     int Duplicate2Posix(int dstHandle) const noexcept;
 
     //dup2 - like semantics, return true on success
-    bool LinkTo(const TFileHandle& fh) const noexcept; 
+    bool LinkTo(const TFileHandle& fh) const noexcept;
 
     //very low-level methods
     bool SetDirect();
@@ -141,7 +141,7 @@ public:
     bool FlushCache(i64 offset = 0, i64 length = 0, bool wait = true) noexcept;
 
 private:
-    FHANDLE Fd_ = INVALID_FHANDLE; 
+    FHANDLE Fd_ = INVALID_FHANDLE;
 };
 
 class TFile {
@@ -149,17 +149,17 @@ public:
     TFile();
     /// Takes ownership of handle, so closes it when the last holder of descriptor dies.
     explicit TFile(FHANDLE fd);
-    TFile(FHANDLE fd, const TString& fname); 
-    TFile(const TString& fName, EOpenMode oMode); 
-    ~TFile(); 
+    TFile(FHANDLE fd, const TString& fname);
+    TFile(const TString& fName, EOpenMode oMode);
+    ~TFile();
 
     void Close();
 
-    const TString& GetName() const noexcept; 
-    i64 GetPosition() const noexcept; 
-    i64 GetLength() const noexcept; 
-    bool IsOpen() const noexcept; 
-    FHANDLE GetHandle() const noexcept; 
+    const TString& GetName() const noexcept;
+    i64 GetPosition() const noexcept;
+    i64 GetLength() const noexcept;
+    bool IsOpen() const noexcept;
+    FHANDLE GetHandle() const noexcept;
 
     i64 Seek(i64 offset, SeekDir origin);
     void Resize(i64 length);
@@ -211,8 +211,8 @@ public:
     //flush unwritten data in this range and optionally wait for completion
     void FlushCache(i64 offset = 0, i64 length = 0, bool wait = true);
 
-    static TFile Temporary(const TString& prefix); 
-    static TFile ForAppend(const TString& path); 
+    static TFile Temporary(const TString& prefix);
+    static TFile ForAppend(const TString& path);
 
 private:
     class TImpl;
@@ -222,4 +222,4 @@ private:
 TFile Duplicate(FILE*);
 TFile Duplicate(int);
 
-bool PosixDisableReadAhead(FHANDLE fileHandle, void* addr) noexcept; 
+bool PosixDisableReadAhead(FHANDLE fileHandle, void* addr) noexcept;
diff --git a/util/system/file_ut.cpp b/util/system/file_ut.cpp
index 8681611514..941e6a50f3 100644
--- a/util/system/file_ut.cpp
+++ b/util/system/file_ut.cpp
@@ -53,7 +53,7 @@ public:
             f2.Write("67890", 5);
         }
 
-        UNIT_ASSERT_EQUAL(TUnbufferedFileInput(tmp2.Name()).ReadAll(), "1234567890"); 
+        UNIT_ASSERT_EQUAL(TUnbufferedFileInput(tmp2.Name()).ReadAll(), "1234567890");
     }
 
     inline void TestAppend() {
@@ -72,7 +72,7 @@ public:
             f.Write("89", 2);
         }
 
-        UNIT_ASSERT_EQUAL(TUnbufferedFileInput(tmp.Name()).ReadAll(), "123456786789"); 
+        UNIT_ASSERT_EQUAL(TUnbufferedFileInput(tmp.Name()).ReadAll(), "123456786789");
     }
 
     inline void TestReWrite() {
@@ -90,7 +90,7 @@ public:
             f.Write("6789", 4);
         }
 
-        UNIT_ASSERT_EQUAL(TUnbufferedFileInput(tmp.Name()).ReadAll(), "67895678"); 
+        UNIT_ASSERT_EQUAL(TUnbufferedFileInput(tmp.Name()).ReadAll(), "67895678");
     }
 
     inline void TestResize() {
@@ -111,7 +111,7 @@ public:
             UNIT_ASSERT_EQUAL(file.GetPosition(), 3);
         }
 
-        const TString data = TUnbufferedFileInput(tmp.Name()).ReadAll(); 
+        const TString data = TUnbufferedFileInput(tmp.Name()).ReadAll();
         UNIT_ASSERT_EQUAL(data.length(), 12);
         UNIT_ASSERT(data.StartsWith("12345"));
     }
@@ -120,7 +120,7 @@ public:
 UNIT_TEST_SUITE_REGISTRATION(TFileTest);
 
 void TFileTest::TestOpen() {
-    TString res; 
+    TString res;
     TFile f1;
 
     try {
diff --git a/util/system/filemap.cpp b/util/system/filemap.cpp
index 2065868199..7454a4cb94 100644
--- a/util/system/filemap.cpp
+++ b/util/system/filemap.cpp
@@ -53,7 +53,7 @@ namespace {
             return *Singleton<TSysInfo>();
         }
 
-        static inline size_t CalcGranularity() noexcept { 
+        static inline size_t CalcGranularity() noexcept {
 #if defined(_win_)
             SYSTEM_INFO sysInfo;
             GetSystemInfo(&sysInfo);
@@ -75,7 +75,7 @@ TString TMemoryMapCommon::UnknownFileName() {
     return "Unknown_file_name";
 }
 
-static inline i64 DownToGranularity(i64 offset) noexcept { 
+static inline i64 DownToGranularity(i64 offset) noexcept {
     return offset & ~((i64)(GRANULARITY - 1));
 }
 
@@ -161,7 +161,7 @@ public:
         }
     }
 
-    inline TImpl(FILE* f, EOpenMode om, TString dbgName) 
+    inline TImpl(FILE* f, EOpenMode om, TString dbgName)
         : File_(Duplicate(f))
         , DbgName_(std::move(dbgName))
         , Length_(File_.GetLength())
@@ -171,7 +171,7 @@ public:
         CreateMapping();
     }
 
-    inline TImpl(const TString& name, EOpenMode om) 
+    inline TImpl(const TString& name, EOpenMode om)
         : File_(name, (om & oRdWr) ? OpenExisting | RdWr : OpenExisting | RdOnly)
         , DbgName_(name)
         , Length_(File_.GetLength())
@@ -181,7 +181,7 @@ public:
         CreateMapping();
     }
 
-    inline TImpl(const TString& name, i64 length, EOpenMode om) 
+    inline TImpl(const TString& name, i64 length, EOpenMode om)
         : File_(name, (om & oRdWr) ? OpenExisting | RdWr : OpenExisting | RdOnly)
         , DbgName_(name)
         , Length_(length)
@@ -196,7 +196,7 @@ public:
         CreateMapping();
     }
 
-    inline TImpl(const TFile& file, EOpenMode om, TString dbgName) 
+    inline TImpl(const TFile& file, EOpenMode om, TString dbgName)
         : File_(file)
         , DbgName_(File_.GetName() ? File_.GetName() : std::move(dbgName))
         , Length_(File_.GetLength())
@@ -206,7 +206,7 @@ public:
         CreateMapping();
     }
 
-    inline bool IsOpen() const noexcept { 
+    inline bool IsOpen() const noexcept {
         return File_.IsOpen()
 #if defined(_win_)
                && Mapping_ != nullptr
@@ -304,7 +304,7 @@ public:
 #endif
     }
 
-    inline ~TImpl() { 
+    inline ~TImpl() {
 #if defined(_win_)
         if (Mapping_) {
             ::CloseHandle(Mapping_); // != FALSE
@@ -317,15 +317,15 @@ public:
 #endif
     }
 
-    inline i64 Length() const noexcept { 
+    inline i64 Length() const noexcept {
         return Length_;
     }
 
-    inline TFile GetFile() const noexcept { 
+    inline TFile GetFile() const noexcept {
         return File_;
     }
 
-    inline TString GetDbgName() const { 
+    inline TString GetDbgName() const {
         return DbgName_;
     }
 
@@ -335,7 +335,7 @@ public:
 
 private:
     TFile File_;
-    TString DbgName_; // This string is never used to actually open a file, only in exceptions 
+    TString DbgName_; // This string is never used to actually open a file, only in exceptions
     i64 Length_;
     EOpenMode Mode_;
 
@@ -346,37 +346,37 @@ private:
 #endif
 };
 
-TMemoryMap::TMemoryMap(const TString& name) 
+TMemoryMap::TMemoryMap(const TString& name)
     : Impl_(new TImpl(name, EOpenModeFlag::oRdOnly))
 {
 }
 
-TMemoryMap::TMemoryMap(const TString& name, EOpenMode om) 
+TMemoryMap::TMemoryMap(const TString& name, EOpenMode om)
     : Impl_(new TImpl(name, om))
 {
 }
 
-TMemoryMap::TMemoryMap(const TString& name, i64 length, EOpenMode om) 
+TMemoryMap::TMemoryMap(const TString& name, i64 length, EOpenMode om)
     : Impl_(new TImpl(name, length, om))
 {
 }
 
-TMemoryMap::TMemoryMap(FILE* f, TString dbgName) 
+TMemoryMap::TMemoryMap(FILE* f, TString dbgName)
     : Impl_(new TImpl(f, EOpenModeFlag::oRdOnly, std::move(dbgName)))
 {
 }
 
-TMemoryMap::TMemoryMap(FILE* f, EOpenMode om, TString dbgName) 
+TMemoryMap::TMemoryMap(FILE* f, EOpenMode om, TString dbgName)
     : Impl_(new TImpl(f, om, std::move(dbgName)))
 {
 }
 
-TMemoryMap::TMemoryMap(const TFile& file, TString dbgName) 
+TMemoryMap::TMemoryMap(const TFile& file, TString dbgName)
     : Impl_(new TImpl(file, EOpenModeFlag::oRdOnly, std::move(dbgName)))
 {
 }
 
-TMemoryMap::TMemoryMap(const TFile& file, EOpenMode om, TString dbgName) 
+TMemoryMap::TMemoryMap(const TFile& file, EOpenMode om, TString dbgName)
     : Impl_(new TImpl(file, om, std::move(dbgName)))
 {
 }
@@ -419,11 +419,11 @@ void TMemoryMap::Evict() {
     Impl_->Evict();
 }
 
-i64 TMemoryMap::Length() const noexcept { 
+i64 TMemoryMap::Length() const noexcept {
     return Impl_->Length();
 }
 
-bool TMemoryMap::IsOpen() const noexcept { 
+bool TMemoryMap::IsOpen() const noexcept {
     return Impl_->IsOpen();
 }
 
@@ -435,41 +435,41 @@ TMemoryMap::EOpenMode TMemoryMap::GetMode() const noexcept {
     return Impl_->GetMode();
 }
 
-TFile TMemoryMap::GetFile() const noexcept { 
+TFile TMemoryMap::GetFile() const noexcept {
     return Impl_->GetFile();
 }
 
-TFileMap::TFileMap(const TMemoryMap& map) noexcept 
+TFileMap::TFileMap(const TMemoryMap& map) noexcept
     : Map_(map)
 {
 }
 
-TFileMap::TFileMap(const TString& name) 
+TFileMap::TFileMap(const TString& name)
     : Map_(name)
 {
 }
 
-TFileMap::TFileMap(const TString& name, EOpenMode om) 
+TFileMap::TFileMap(const TString& name, EOpenMode om)
     : Map_(name, om)
 {
 }
 
-TFileMap::TFileMap(const TString& name, i64 length, EOpenMode om) 
+TFileMap::TFileMap(const TString& name, i64 length, EOpenMode om)
     : Map_(name, length, om)
 {
 }
 
-TFileMap::TFileMap(FILE* f, EOpenMode om, TString dbgName) 
+TFileMap::TFileMap(FILE* f, EOpenMode om, TString dbgName)
     : Map_(f, om, dbgName)
 {
 }
 
-TFileMap::TFileMap(const TFile& file, EOpenMode om, TString dbgName) 
+TFileMap::TFileMap(const TFile& file, EOpenMode om, TString dbgName)
     : Map_(file, om, dbgName)
 {
 }
 
-TFileMap::TFileMap(const TFileMap& fm) noexcept 
+TFileMap::TFileMap(const TFileMap& fm) noexcept
     : Map_(fm.Map_)
 {
 }
@@ -516,7 +516,7 @@ void TFileMap::Unmap() {
     }
 }
 
-TFileMap::~TFileMap() { 
+TFileMap::~TFileMap() {
     try {
         // explicit Unmap() is required because in oNotGreedy mode the Map_ object doesn't own the mapped area
         Unmap();
diff --git a/util/system/filemap.h b/util/system/filemap.h
index 3f80fe1ded..11be64bff4 100644
--- a/util/system/filemap.h
+++ b/util/system/filemap.h
@@ -9,7 +9,7 @@
 #include <util/generic/utility.h>
 #include <util/generic/yexception.h>
 #include <util/generic/flags.h>
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 
 #include <new>
 #include <cstdio>
@@ -21,19 +21,19 @@ namespace NPrivate {
 
 struct TMemoryMapCommon {
     struct TMapResult {
-        inline size_t MappedSize() const noexcept { 
+        inline size_t MappedSize() const noexcept {
             return Size - Head;
         }
 
-        inline void* MappedData() const noexcept { 
+        inline void* MappedData() const noexcept {
             return Ptr ? (void*)((char*)Ptr + Head) : nullptr;
         }
 
-        inline bool IsMapped() const noexcept { 
+        inline bool IsMapped() const noexcept {
             return Ptr != nullptr;
         }
 
-        inline void Reset() noexcept { 
+        inline void Reset() noexcept {
             Ptr = nullptr;
             Size = 0;
             Head = 0;
@@ -43,7 +43,7 @@ struct TMemoryMapCommon {
         size_t Size;
         i32 Head;
 
-        TMapResult(void) noexcept { 
+        TMapResult(void) noexcept {
             Reset();
         }
     };
@@ -70,15 +70,15 @@ Y_DECLARE_OPERATORS_FOR_FLAGS(TMemoryMapCommon::EOpenMode)
 
 class TMemoryMap: public TMemoryMapCommon {
 public:
-    explicit TMemoryMap(const TString& name); 
-    explicit TMemoryMap(const TString& name, EOpenMode om); 
-    TMemoryMap(const TString& name, i64 length, EOpenMode om); 
+    explicit TMemoryMap(const TString& name);
+    explicit TMemoryMap(const TString& name, EOpenMode om);
+    TMemoryMap(const TString& name, i64 length, EOpenMode om);
     TMemoryMap(FILE* f, TString dbgName = UnknownFileName());
     TMemoryMap(FILE* f, EOpenMode om, TString dbgName = UnknownFileName());
     TMemoryMap(const TFile& file, TString dbgName = UnknownFileName());
     TMemoryMap(const TFile& file, EOpenMode om, TString dbgName = UnknownFileName());
 
-    ~TMemoryMap(); 
+    ~TMemoryMap();
 
     TMapResult Map(i64 offset, size_t size);
     bool Unmap(TMapResult region);
@@ -86,11 +86,11 @@ public:
     void ResizeAndReset(i64 size);
     TMapResult ResizeAndRemap(i64 offset, size_t size);
 
-    i64 Length() const noexcept; 
-    bool IsOpen() const noexcept; 
+    i64 Length() const noexcept;
+    bool IsOpen() const noexcept;
     bool IsWritable() const noexcept;
     EOpenMode GetMode() const noexcept;
-    TFile GetFile() const noexcept; 
+    TFile GetFile() const noexcept;
 
     void SetSequential();
     void Evict(void* ptr, size_t len);
@@ -108,15 +108,15 @@ private:
 
 class TFileMap: public TMemoryMapCommon {
 public:
-    TFileMap(const TMemoryMap& map) noexcept; 
-    TFileMap(const TString& name); 
-    TFileMap(const TString& name, EOpenMode om); 
-    TFileMap(const TString& name, i64 length, EOpenMode om); 
+    TFileMap(const TMemoryMap& map) noexcept;
+    TFileMap(const TString& name);
+    TFileMap(const TString& name, EOpenMode om);
+    TFileMap(const TString& name, i64 length, EOpenMode om);
     TFileMap(FILE* f, EOpenMode om = oRdOnly, TString dbgName = UnknownFileName());
     TFileMap(const TFile& file, EOpenMode om = oRdOnly, TString dbgName = UnknownFileName());
-    TFileMap(const TFileMap& fm) noexcept; 
+    TFileMap(const TFileMap& fm) noexcept;
 
-    ~TFileMap(); 
+    ~TFileMap();
 
     TMapResult Map(i64 offset, size_t size);
     TMapResult ResizeAndRemap(i64 offset, size_t size);
@@ -138,11 +138,11 @@ public:
         FlushAsync(Ptr(), MappedSize());
     }
 
-    inline i64 Length() const noexcept { 
+    inline i64 Length() const noexcept {
         return Map_.Length();
     }
 
-    inline bool IsOpen() const noexcept { 
+    inline bool IsOpen() const noexcept {
         return Map_.IsOpen();
     }
 
@@ -154,15 +154,15 @@ public:
         return Map_.GetMode();
     }
 
-    inline void* Ptr() const noexcept { 
+    inline void* Ptr() const noexcept {
         return Region_.MappedData();
     }
 
-    inline size_t MappedSize() const noexcept { 
+    inline size_t MappedSize() const noexcept {
         return Region_.MappedSize();
     }
 
-    TFile GetFile() const noexcept { 
+    TFile GetFile() const noexcept {
         return Map_.GetFile();
     }
 
@@ -241,7 +241,7 @@ public:
         Dummy_.Destroy();
         Dummy_.Reset(new (DummyData()) T(n_Dummy));
     }
-    inline char* DummyData() const noexcept { 
+    inline char* DummyData() const noexcept {
         return AlignUp((char*)DummyData_);
     }
     inline const T& Dummy() const {
@@ -260,22 +260,22 @@ public:
         return 0 == Size_;
     }
     /// for STL compatibility only, Begin() usage is recommended
-    const T* begin() const noexcept { 
+    const T* begin() const noexcept {
         return Begin();
     }
-    const T* Begin() const noexcept { 
+    const T* Begin() const noexcept {
         return Ptr_;
     }
     /// for STL compatibility only, End() usage is recommended
-    const T* end() const noexcept { 
+    const T* end() const noexcept {
         return End_;
     }
-    const T* End() const noexcept { 
+    const T* End() const noexcept {
         return End_;
     }
 
 private:
-    void DoInit(const TString& fileName) { 
+    void DoInit(const TString& fileName) {
         DataHolder_->Map(0, DataHolder_->Length());
         if (DataHolder_->Length() % sizeof(T)) {
             Term();
@@ -308,10 +308,10 @@ public:
     char* Data(ui32 pos = 0) const {
         return (char*)(Ptr_ ? ((char*)Ptr_ + pos) : nullptr);
     }
-    char* Begin() const noexcept { 
+    char* Begin() const noexcept {
         return (char*)Ptr();
     }
-    char* End() const noexcept { 
+    char* End() const noexcept {
         return Begin() + MappedSize();
     }
     size_t MappedSize() const {
diff --git a/util/system/filemap_ut.cpp b/util/system/filemap_ut.cpp
index 158be2bd58..73f109dc88 100644
--- a/util/system/filemap_ut.cpp
+++ b/util/system/filemap_ut.cpp
@@ -301,7 +301,7 @@ Y_UNIT_TEST_SUITE(TFileMapTest) {
             mappedMem.Map(mappedMem.Length() / 2, mappedMem.Length() + 100); // overflow
             UNIT_ASSERT(0);                                                  // should not go here
         } catch (yexception& exc) {
-            TString text = exc.what(); // exception should contain failed file name 
+            TString text = exc.what(); // exception should contain failed file name
             UNIT_ASSERT(text.find(TMemoryMapCommon::UnknownFileName()) != TString::npos);
             fclose(f);
         }
@@ -312,8 +312,8 @@ Y_UNIT_TEST_SUITE(TFileMapTest) {
             mappedMem.Map(mappedMem.Length() / 2, mappedMem.Length() + 100); // overflow
             UNIT_ASSERT(0);                                                  // should not go here
         } catch (yexception& exc) {
-            TString text = exc.what(); // exception should contain failed file name 
-            UNIT_ASSERT(text.find(FileName_) != TString::npos); 
+            TString text = exc.what(); // exception should contain failed file name
+            UNIT_ASSERT(text.find(FileName_) != TString::npos);
         }
         NFs::Remove(FileName_);
     }
diff --git a/util/system/fs.cpp b/util/system/fs.cpp
index 33ff900888..d2611a8ccc 100644
--- a/util/system/fs.cpp
+++ b/util/system/fs.cpp
@@ -16,7 +16,7 @@
 #include <util/system/fstat.h>
 #include <util/folder/path.h>
 
-bool NFs::Remove(const TString& path) { 
+bool NFs::Remove(const TString& path) {
 #if defined(_win_)
     return NFsPrivate::WinRemove(path);
 #else
@@ -24,7 +24,7 @@ bool NFs::Remove(const TString& path) {
 #endif
 }
 
-void NFs::RemoveRecursive(const TString& path) { 
+void NFs::RemoveRecursive(const TString& path) {
     static const TStringBuf errStr = "error while removing ";
 
     if (!NFs::Exists(path)) {
@@ -53,7 +53,7 @@ void NFs::RemoveRecursive(const TString& path) {
     }
 }
 
-bool NFs::MakeDirectory(const TString& path, EFilePermissions mode) { 
+bool NFs::MakeDirectory(const TString& path, EFilePermissions mode) {
 #if defined(_win_)
     Y_UNUSED(mode);
     return NFsPrivate::WinMakeDirectory(path);
@@ -62,7 +62,7 @@ bool NFs::MakeDirectory(const TString& path, EFilePermissions mode) {
 #endif
 }
 
-bool NFs::MakeDirectoryRecursive(const TString& path, EFilePermissions mode, bool alwaysCreate) { 
+bool NFs::MakeDirectoryRecursive(const TString& path, EFilePermissions mode, bool alwaysCreate) {
     if (NFs::Exists(path) && TFileStat(path).IsDir()) {
         if (alwaysCreate) {
             ythrow TIoException() << "path " << path << " already exists"
@@ -84,7 +84,7 @@ bool NFs::MakeDirectoryRecursive(const TString& path, EFilePermissions mode, boo
     }
 }
 
-bool NFs::Rename(const TString& oldPath, const TString& newPath) { 
+bool NFs::Rename(const TString& oldPath, const TString& newPath) {
 #if defined(_win_)
     return NFsPrivate::WinRename(oldPath, newPath);
 #else
@@ -92,13 +92,13 @@ bool NFs::Rename(const TString& oldPath, const TString& newPath) {
 #endif
 }
 
-void NFs::HardLinkOrCopy(const TString& existingPath, const TString& newPath) { 
+void NFs::HardLinkOrCopy(const TString& existingPath, const TString& newPath) {
     if (!NFs::HardLink(existingPath, newPath)) {
         Copy(existingPath, newPath);
     }
 }
 
-bool NFs::HardLink(const TString& existingPath, const TString& newPath) { 
+bool NFs::HardLink(const TString& existingPath, const TString& newPath) {
 #if defined(_win_)
     return NFsPrivate::WinHardLink(existingPath, newPath);
 #elif defined(_unix_)
@@ -106,7 +106,7 @@ bool NFs::HardLink(const TString& existingPath, const TString& newPath) {
 #endif
 }
 
-bool NFs::SymLink(const TString& targetPath, const TString& linkPath) { 
+bool NFs::SymLink(const TString& targetPath, const TString& linkPath) {
 #if defined(_win_)
     return NFsPrivate::WinSymLink(targetPath, linkPath);
 #elif defined(_unix_)
@@ -114,7 +114,7 @@ bool NFs::SymLink(const TString& targetPath, const TString& linkPath) {
 #endif
 }
 
-TString NFs::ReadLink(const TString& path) { 
+TString NFs::ReadLink(const TString& path) {
 #if defined(_win_)
     return NFsPrivate::WinReadLink(path);
 #elif defined(_unix_)
@@ -125,28 +125,28 @@ TString NFs::ReadLink(const TString& path) {
             ythrow yexception() << "can't read link " << path << ", errno = " << errno;
         }
         if (r < (ssize_t)buf.Size()) {
-            return TString(buf.Data(), r); 
+            return TString(buf.Data(), r);
         }
         buf = TTempBuf(buf.Size() * 2);
     }
 #endif
 }
 
-void NFs::Cat(const TString& dstPath, const TString& srcPath) { 
-    TUnbufferedFileInput src(srcPath); 
-    TUnbufferedFileOutput dst(TFile(dstPath, ForAppend | WrOnly | Seq)); 
+void NFs::Cat(const TString& dstPath, const TString& srcPath) {
+    TUnbufferedFileInput src(srcPath);
+    TUnbufferedFileOutput dst(TFile(dstPath, ForAppend | WrOnly | Seq));
 
     TransferData(&src, &dst);
 }
 
-void NFs::Copy(const TString& existingPath, const TString& newPath) { 
-    TUnbufferedFileInput src(existingPath); 
-    TUnbufferedFileOutput dst(TFile(newPath, CreateAlways | WrOnly | Seq)); 
+void NFs::Copy(const TString& existingPath, const TString& newPath) {
+    TUnbufferedFileInput src(existingPath);
+    TUnbufferedFileOutput dst(TFile(newPath, CreateAlways | WrOnly | Seq));
 
     TransferData(&src, &dst);
 }
 
-bool NFs::Exists(const TString& path) { 
+bool NFs::Exists(const TString& path) {
 #if defined(_win_)
     return NFsPrivate::WinExists(path);
 #elif defined(_unix_)
@@ -154,7 +154,7 @@ bool NFs::Exists(const TString& path) {
 #endif
 }
 
-TString NFs::CurrentWorkingDirectory() { 
+TString NFs::CurrentWorkingDirectory() {
 #if defined(_win_)
     return NFsPrivate::WinCurrentWorkingDirectory();
 #elif defined(_unix_)
@@ -167,7 +167,7 @@ TString NFs::CurrentWorkingDirectory() {
 #endif
 }
 
-void NFs::SetCurrentWorkingDirectory(TString path) { 
+void NFs::SetCurrentWorkingDirectory(TString path) {
 #ifdef _win_
     bool ok = NFsPrivate::WinSetCurrentWorkingDirectory(path);
 #else
diff --git a/util/system/fs.h b/util/system/fs.h
index a412f6cb15..237daf2d2d 100644
--- a/util/system/fs.h
+++ b/util/system/fs.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <util/generic/flags.h>
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 #include <util/generic/yexception.h>
 
 namespace NFs {
@@ -28,27 +28,27 @@ namespace NFs {
     /// @param[in] path  Path to file or directory
     /// @returns         true on success or false otherwise
     /// LastSystemError() is set in case of failure
-    bool Remove(const TString& path); 
+    bool Remove(const TString& path);
 
     /// Remove a file or directory with contents
     ///
     /// @param[in] path  Path to file or directory
     /// @throws
-    void RemoveRecursive(const TString& path); 
+    void RemoveRecursive(const TString& path);
 
     /// Creates directory
     ///
     /// @param[in] path  Path to the directory
     /// @param[in] mode  Access permissions field; NOTE: ignored on win
     /// @returns         true on success or false otherwise
-    bool MakeDirectory(const TString& path, EFilePermissions mode); 
+    bool MakeDirectory(const TString& path, EFilePermissions mode);
 
     /// Creates directory
     ///
     /// @param[in] path  Path to the directory
     /// @returns         true on success or false otherwise
     /// NOTE: access permissions is set to 0777
-    inline bool MakeDirectory(const TString& path) { 
+    inline bool MakeDirectory(const TString& path) {
         return MakeDirectory(path, FP_COMMON_FILE);
     }
 
@@ -58,14 +58,14 @@ namespace NFs {
     /// @param[in] mode          Access permissions field; NOTE: ignored on win
     /// @param[in] alwaysCreate  Throw if path already exists or failed to create
     /// @returns                 true if target path created or exists (and directory)
-    bool MakeDirectoryRecursive(const TString& path, EFilePermissions mode, bool alwaysCreate); 
+    bool MakeDirectoryRecursive(const TString& path, EFilePermissions mode, bool alwaysCreate);
 
     /// Creates directory and all non-existings parents
     ///
     /// @param[in] path          Path to be created
     /// @param[in] mode          Access permissions field; NOTE: ignored on win
     /// @returns                 true if target path created or exists (and directory)
-    inline bool MakeDirectoryRecursive(const TString& path, EFilePermissions mode) { 
+    inline bool MakeDirectoryRecursive(const TString& path, EFilePermissions mode) {
         return MakeDirectoryRecursive(path, mode, false);
     }
 
@@ -73,7 +73,7 @@ namespace NFs {
     ///
     /// @param[in] path          Path to be created
     /// @returns                 true if target path created or exists (and directory)
-    inline bool MakeDirectoryRecursive(const TString& path) { 
+    inline bool MakeDirectoryRecursive(const TString& path) {
         return MakeDirectoryRecursive(path, FP_COMMON_FILE, false);
     }
 
@@ -84,14 +84,14 @@ namespace NFs {
     /// @param[in] newPath  New path of file or directory
     /// @returns            true on success or false otherwise
     /// LastSystemError() is set in case of failure
-    bool Rename(const TString& oldPath, const TString& newPath); 
+    bool Rename(const TString& oldPath, const TString& newPath);
 
     /// Creates a new directory entry for a file
     /// or creates a new one with the same content
     ///
     /// @param[in] existingPath  Path to an existing file
     /// @param[in] newPath       New path of file
-    void HardLinkOrCopy(const TString& existingPath, const TString& newPath); 
+    void HardLinkOrCopy(const TString& existingPath, const TString& newPath);
 
     /// Creates a new directory entry for a file
     ///
@@ -99,7 +99,7 @@ namespace NFs {
     /// @param[in] newPath       New path of file
     /// @returns                 true if new link was created or false otherwise
     /// LastSystemError() is set in case of failure
-    bool HardLink(const TString& existingPath, const TString& newPath); 
+    bool HardLink(const TString& existingPath, const TString& newPath);
 
     /// Creates a symlink to a file
     ///
@@ -107,47 +107,47 @@ namespace NFs {
     /// @param[in] linkPath      Path of symlink
     /// @returns                 true if new link was created or false otherwise
     /// LastSystemError() is set in case of failure
-    bool SymLink(const TString& targetPath, const TString& linkPath); 
+    bool SymLink(const TString& targetPath, const TString& linkPath);
 
     /// Reads value of a symbolic link
     ///
     /// @param[in] path    Path to a symlink
     /// @returns           File path that a symlink points to
-    TString ReadLink(const TString& path); 
+    TString ReadLink(const TString& path);
 
     /// Append contents of a file to a new file
     ///
     /// @param[in] dstPath  Path to a destination file
     /// @param[in] srcPath  Path to a source file
-    void Cat(const TString& dstPath, const TString& srcPath); 
+    void Cat(const TString& dstPath, const TString& srcPath);
 
     /// Copy contents of a file to a new file
     ///
     /// @param[in] existingPath  Path to an existing file
     /// @param[in] newPath       New path of file
-    void Copy(const TString& existingPath, const TString& newPath); 
+    void Copy(const TString& existingPath, const TString& newPath);
 
     /// Returns path to the current working directory
     ///
     /// Note: is not threadsafe
-    TString CurrentWorkingDirectory(); 
+    TString CurrentWorkingDirectory();
 
     /// Changes current working directory
     ///
     /// @param[in] path          Path for new cwd
     /// Note: is not threadsafe
-    void SetCurrentWorkingDirectory(TString path); 
+    void SetCurrentWorkingDirectory(TString path);
 
     /// Checks if file exists
     ///
     /// @param[in] path          Path to check
-    bool Exists(const TString& path); 
+    bool Exists(const TString& path);
 
     /// Ensures that file exists
     ///
     /// @param[in] path          Path to check
     /// @returns                 input argument
-    inline const TString& EnsureExists(const TString& path) { 
+    inline const TString& EnsureExists(const TString& path) {
         Y_ENSURE_EX(Exists(path), TFileError{} << "Path " << path << " does not exists (checked from cwd:" << NFs::CurrentWorkingDirectory() << ")");
         return path;
     }
diff --git a/util/system/fs_ut.cpp b/util/system/fs_ut.cpp
index 1b3baff09f..de071ebf55 100644
--- a/util/system/fs_ut.cpp
+++ b/util/system/fs_ut.cpp
@@ -56,7 +56,7 @@ void TFsTest::TestCreateRemove() {
     UNIT_ASSERT_EXCEPTION(NFs::MakeDirectoryRecursive(subdir1, NFs::FP_COMMON_FILE, true), TIoException);
 
     TFsPath file1 = dir1 / "f1.txt";
-    TFsPath file2 = subdir1 + TString("_f2.txt"); 
+    TFsPath file2 = subdir1 + TString("_f2.txt");
     TFsPath file3 = subdir1 / "f2.txt";
     Touch(file1);
     Touch(file2);
@@ -70,7 +70,7 @@ void TFsTest::TestCreateRemove() {
     UNIT_ASSERT(!NFs::MakeDirectoryRecursive(file1 / "subdir1" / "subdir2", NFs::FP_COMMON_FILE, false));
     UNIT_ASSERT(!NFs::MakeDirectoryRecursive(file1, NFs::FP_COMMON_FILE, false));
 
-    TString longUtf8Name = ""; 
+    TString longUtf8Name = "";
     while (longUtf8Name.size() < 255) {
         longUtf8Name = longUtf8Name + "fф";
     }
@@ -191,7 +191,7 @@ void TFsTest::TestHardlink() {
     RunHardlinkTest("tempfile_абвг", "hardlinkfile_абвг"); //utf-8 names
 }
 
-static void RunSymLinkTest(TString fileLocalName, TString symLinkName) { 
+static void RunSymLinkTest(TString fileLocalName, TString symLinkName) {
     // if previous running was failed
     TFsPath subDir = "tempsubdir";
     TFsPath srcFile = subDir / fileLocalName;
@@ -222,8 +222,8 @@ static void RunSymLinkTest(TString fileLocalName, TString symLinkName) {
     UNIT_ASSERT(NFs::SymLink(subDir, linkD1));
     UNIT_ASSERT(NFs::SymLink("../dir2", linkD2));
     UNIT_ASSERT(NFs::SymLink("../dir3", dangling));
-    UNIT_ASSERT_STRINGS_EQUAL(NFs::ReadLink(linkD2), TString("..") + LOCSLASH_S "dir2"); 
-    UNIT_ASSERT_STRINGS_EQUAL(NFs::ReadLink(dangling), TString("..") + LOCSLASH_S "dir3"); 
+    UNIT_ASSERT_STRINGS_EQUAL(NFs::ReadLink(linkD2), TString("..") + LOCSLASH_S "dir2");
+    UNIT_ASSERT_STRINGS_EQUAL(NFs::ReadLink(dangling), TString("..") + LOCSLASH_S "dir3");
     {
         TFile file(linkD1 / fileLocalName, OpenExisting | RdOnly);
         UNIT_ASSERT_VALUES_EQUAL(file.GetLength(), 7);
@@ -311,7 +311,7 @@ void TFsTest::TestEnsureExists() {
     UNIT_ASSERT_EXCEPTION(NFs::EnsureExists(nonExists), TFileError);
 
     TStringBuilder expected;
-    TString got; 
+    TString got;
     try {
         NFs::EnsureExists(nonExists);
         expected << __LOCATION__;
diff --git a/util/system/fs_win.cpp b/util/system/fs_win.cpp
index 79f7c43ecd..a410ccac06 100644
--- a/util/system/fs_win.cpp
+++ b/util/system/fs_win.cpp
@@ -9,7 +9,7 @@
 #include <winioctl.h>
 
 namespace NFsPrivate {
-    static LPCWSTR UTF8ToWCHAR(const TStringBuf str, TUtf16String& wstr) { 
+    static LPCWSTR UTF8ToWCHAR(const TStringBuf str, TUtf16String& wstr) {
         wstr.resize(str.size());
         size_t written = 0;
         if (!UTF8ToWide(str.data(), str.size(), wstr.begin(), written))
@@ -19,14 +19,14 @@ namespace NFsPrivate {
         return (const WCHAR*)wstr.data();
     }
 
-    static TString WCHARToUTF8(const LPWSTR wstr, size_t len) { 
+    static TString WCHARToUTF8(const LPWSTR wstr, size_t len) {
         static_assert(sizeof(WCHAR) == sizeof(wchar16), "expect sizeof(WCHAR) == sizeof(wchar16)");
 
         return WideToUTF8((wchar16*)wstr, len);
     }
 
     HANDLE CreateFileWithUtf8Name(const TStringBuf fName, ui32 accessMode, ui32 shareMode, ui32 createMode, ui32 attributes, bool inheritHandle) {
-        TUtf16String wstr; 
+        TUtf16String wstr;
         LPCWSTR wname = UTF8ToWCHAR(fName, wstr);
         if (!wname) {
             ::SetLastError(ERROR_INVALID_NAME);
@@ -39,8 +39,8 @@ namespace NFsPrivate {
         return ::CreateFileW(wname, accessMode, shareMode, &secAttrs, createMode, attributes, nullptr);
     }
 
-    bool WinRename(const TString& oldPath, const TString& newPath) { 
-        TUtf16String op, np; 
+    bool WinRename(const TString& oldPath, const TString& newPath) {
+        TUtf16String op, np;
         LPCWSTR opPtr = UTF8ToWCHAR(oldPath, op);
         LPCWSTR npPtr = UTF8ToWCHAR(newPath, np);
         if (!opPtr || !npPtr) {
@@ -51,8 +51,8 @@ namespace NFsPrivate {
         return MoveFileExW(opPtr, npPtr, MOVEFILE_REPLACE_EXISTING) != 0;
     }
 
-    bool WinRemove(const TString& path) { 
-        TUtf16String wstr; 
+    bool WinRemove(const TString& path) {
+        TUtf16String wstr;
         LPCWSTR wname = UTF8ToWCHAR(path, wstr);
         if (!wname) {
             ::SetLastError(ERROR_INVALID_NAME);
@@ -68,16 +68,16 @@ namespace NFsPrivate {
         return false;
     }
 
-    bool WinSymLink(const TString& targetName, const TString& linkName) { 
-        TString tName(targetName); 
+    bool WinSymLink(const TString& targetName, const TString& linkName) {
+        TString tName(targetName);
         {
             size_t pos;
-            while ((pos = tName.find('/')) != TString::npos) 
+            while ((pos = tName.find('/')) != TString::npos)
                 tName.replace(pos, 1, LOCSLASH_S);
         }
-        TUtf16String tstr; 
+        TUtf16String tstr;
         LPCWSTR wname = UTF8ToWCHAR(tName, tstr);
-        TUtf16String lstr; 
+        TUtf16String lstr;
         LPCWSTR lname = UTF8ToWCHAR(linkName, lstr);
 
         // we can't create a dangling link to a dir in this way
@@ -85,14 +85,14 @@ namespace NFsPrivate {
         if (attr == INVALID_FILE_ATTRIBUTES) {
             TTempBuf result;
             if (GetFullPathNameW(lname, result.Size(), (LPWSTR)result.Data(), 0) != 0) {
-                TString fullPath = WideToUTF8(TWtringBuf((const wchar16*)result.Data())); 
+                TString fullPath = WideToUTF8(TWtringBuf((const wchar16*)result.Data()));
                 TStringBuf linkDir(fullPath);
                 linkDir.RNextTok('\\');
 
                 if (linkDir) {
-                    TString fullTarget(tName); 
+                    TString fullTarget(tName);
                     resolvepath(fullTarget, TString{linkDir});
-                    TUtf16String fullTargetW; 
+                    TUtf16String fullTargetW;
                     LPCWSTR ptrFullTarget = UTF8ToWCHAR(fullTarget, fullTargetW);
                     attr = ::GetFileAttributesW(ptrFullTarget);
                 }
@@ -101,8 +101,8 @@ namespace NFsPrivate {
         return 0 != CreateSymbolicLinkW(lname, wname, attr != INVALID_FILE_ATTRIBUTES && (attr & FILE_ATTRIBUTE_DIRECTORY) ? SYMBOLIC_LINK_FLAG_DIRECTORY : 0);
     }
 
-    bool WinHardLink(const TString& existingPath, const TString& newPath) { 
-        TUtf16String ep, np; 
+    bool WinHardLink(const TString& existingPath, const TString& newPath) {
+        TUtf16String ep, np;
         LPCWSTR epPtr = UTF8ToWCHAR(existingPath, ep);
         LPCWSTR npPtr = UTF8ToWCHAR(newPath, np);
         if (!epPtr || !npPtr) {
@@ -113,13 +113,13 @@ namespace NFsPrivate {
         return (CreateHardLinkW(npPtr, epPtr, nullptr) != 0);
     }
 
-    bool WinExists(const TString& path) { 
-        TUtf16String buf; 
+    bool WinExists(const TString& path) {
+        TUtf16String buf;
         LPCWSTR ptr = UTF8ToWCHAR(path, buf);
         return ::GetFileAttributesW(ptr) != INVALID_FILE_ATTRIBUTES;
     }
 
-    TString WinCurrentWorkingDirectory() { 
+    TString WinCurrentWorkingDirectory() {
         TTempBuf result;
         LPWSTR buf = reinterpret_cast<LPWSTR>(result.Data());
         int r = GetCurrentDirectoryW(result.Size() / sizeof(WCHAR), buf);
@@ -128,8 +128,8 @@ namespace NFsPrivate {
         return WCHARToUTF8(buf, r);
     }
 
-    bool WinSetCurrentWorkingDirectory(const TString& path) { 
-        TUtf16String wstr; 
+    bool WinSetCurrentWorkingDirectory(const TString& path) {
+        TUtf16String wstr;
         LPCWSTR wname = UTF8ToWCHAR(path, wstr);
         if (!wname) {
             ::SetLastError(ERROR_INVALID_NAME);
@@ -138,8 +138,8 @@ namespace NFsPrivate {
         return SetCurrentDirectoryW(wname);
     }
 
-    bool WinMakeDirectory(const TString path) { 
-        TUtf16String buf; 
+    bool WinMakeDirectory(const TString path) {
+        TUtf16String buf;
         LPCWSTR ptr = UTF8ToWCHAR(path, buf);
         return CreateDirectoryW(ptr, (LPSECURITY_ATTRIBUTES) nullptr);
     }
@@ -180,7 +180,7 @@ namespace NFsPrivate {
 
     // the end of edited part of <Ntifs.h>
 
-    TString WinReadLink(const TString& name) { 
+    TString WinReadLink(const TString& name) {
         TFileHandle h = CreateFileWithUtf8Name(name, GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING,
                                                FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS, true);
         TTempBuf buf;
@@ -199,7 +199,7 @@ namespace NFsPrivate {
                     return WideToUTF8(str, len);
                 }
                 //this reparse point is unsupported in arcadia
-                return TString(); 
+                return TString();
             } else {
                 if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
                     buf = TTempBuf(buf.Size() * 2);
diff --git a/util/system/fs_win.h b/util/system/fs_win.h
index b32bb0fefe..8086129828 100644
--- a/util/system/fs_win.h
+++ b/util/system/fs_win.h
@@ -4,26 +4,26 @@
 #include "defaults.h"
 
 #include <util/generic/strbuf.h>
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 
 namespace NFsPrivate {
-    bool WinRename(const TString& oldPath, const TString& newPath); 
+    bool WinRename(const TString& oldPath, const TString& newPath);
 
-    bool WinSymLink(const TString& targetName, const TString& linkName); 
+    bool WinSymLink(const TString& targetName, const TString& linkName);
 
-    bool WinHardLink(const TString& existingPath, const TString& newPath); 
+    bool WinHardLink(const TString& existingPath, const TString& newPath);
 
-    TString WinReadLink(const TString& path); 
+    TString WinReadLink(const TString& path);
 
     HANDLE CreateFileWithUtf8Name(const TStringBuf fName, ui32 accessMode, ui32 shareMode, ui32 createMode, ui32 attributes, bool inheritHandle);
 
-    bool WinRemove(const TString& path); 
+    bool WinRemove(const TString& path);
 
-    bool WinExists(const TString& path); 
+    bool WinExists(const TString& path);
 
-    TString WinCurrentWorkingDirectory(); 
+    TString WinCurrentWorkingDirectory();
 
-    bool WinSetCurrentWorkingDirectory(const TString& path); 
+    bool WinSetCurrentWorkingDirectory(const TString& path);
 
-    bool WinMakeDirectory(const TString path); 
+    bool WinMakeDirectory(const TString path);
 }
diff --git a/util/system/fstat.cpp b/util/system/fstat.cpp
index 1fc66b4f70..81e98cbc6b 100644
--- a/util/system/fstat.cpp
+++ b/util/system/fstat.cpp
@@ -124,7 +124,7 @@ TFileStat::TFileStat(const TFsPath& fileName, bool nofollow) {
     MakeFromFileName(fileName.GetPath().data(), nofollow);
 }
 
-TFileStat::TFileStat(const TString& fileName, bool nofollow) { 
+TFileStat::TFileStat(const TString& fileName, bool nofollow) {
     MakeFromFileName(fileName.data(), nofollow);
 }
 
@@ -210,6 +210,6 @@ i64 GetFileLength(const char* name) {
 #endif
 }
 
-i64 GetFileLength(const TString& name) { 
+i64 GetFileLength(const TString& name) {
     return GetFileLength(name.data());
 }
diff --git a/util/system/fstat.h b/util/system/fstat.h
index e1505e6041..64e79e1b55 100644
--- a/util/system/fstat.h
+++ b/util/system/fstat.h
@@ -32,7 +32,7 @@ public:
     explicit TFileStat(const TFile& f);
     explicit TFileStat(FHANDLE f);
     TFileStat(const TFsPath& fileName, bool nofollow = false);
-    TFileStat(const TString& fileName, bool nofollow = false); 
+    TFileStat(const TString& fileName, bool nofollow = false);
     TFileStat(const char* fileName, bool nofollow = false);
 
     friend bool operator==(const TFileStat& l, const TFileStat& r) noexcept;
@@ -44,4 +44,4 @@ private:
 
 i64 GetFileLength(FHANDLE fd);
 i64 GetFileLength(const char* name);
-i64 GetFileLength(const TString& name); 
+i64 GetFileLength(const TString& name);
diff --git a/util/system/fstat_ut.cpp b/util/system/fstat_ut.cpp
index ed126eaead..160ecd936e 100644
--- a/util/system/fstat_ut.cpp
+++ b/util/system/fstat_ut.cpp
@@ -10,7 +10,7 @@
 
 Y_UNIT_TEST_SUITE(TestFileStat) {
     Y_UNIT_TEST(FileTest) {
-        TString fileName = "f1.txt"; 
+        TString fileName = "f1.txt";
         TFileStat oFs;
         {
             TFile file(fileName.data(), OpenAlways | WrOnly);
diff --git a/util/system/guard.h b/util/system/guard.h
index 19c4491424..efc091d5f8 100644
--- a/util/system/guard.h
+++ b/util/system/guard.h
@@ -8,14 +8,14 @@ struct TCommonLockOps {
         t->Acquire();
     }
 
-    static inline void Release(T* t) noexcept { 
+    static inline void Release(T* t) noexcept {
         t->Release();
     }
 };
 
 template <class T>
 struct TTryLockOps: public TCommonLockOps<T> {
-    static inline bool TryAcquire(T* t) noexcept { 
+    static inline bool TryAcquire(T* t) noexcept {
         return t->TryAcquire();
     }
 };
@@ -24,7 +24,7 @@ struct TTryLockOps: public TCommonLockOps<T> {
 template <class TOps>
 struct TInverseLockOps: public TOps {
     template <class T>
-    static inline void Acquire(T* t) noexcept { 
+    static inline void Acquire(T* t) noexcept {
         TOps::Release(t);
     }
 
@@ -45,32 +45,32 @@ public:
         Init(t);
     }
 
-    inline TGuard(TGuard&& g) noexcept 
+    inline TGuard(TGuard&& g) noexcept
         : T_(g.T_)
     {
         g.T_ = nullptr;
     }
 
-    inline ~TGuard() { 
+    inline ~TGuard() {
         Release();
     }
 
-    inline void Release() noexcept { 
+    inline void Release() noexcept {
         if (WasAcquired()) {
             TOps::Release(T_);
             T_ = nullptr;
         }
     }
 
-    explicit inline operator bool() const noexcept { 
+    explicit inline operator bool() const noexcept {
         return WasAcquired();
     }
 
-    inline bool WasAcquired() const noexcept { 
+    inline bool WasAcquired() const noexcept {
         return T_ != nullptr;
     }
 
-    inline T* GetMutex() const noexcept { 
+    inline T* GetMutex() const noexcept {
         return T_;
     }
 
@@ -129,11 +129,11 @@ static inline TInverseGuard<T> Unguard(const T& mutex) {
 template <class T, class TOps = TTryLockOps<T>>
 class TTryGuard: public TNonCopyable {
 public:
-    inline TTryGuard(const T& t) noexcept { 
+    inline TTryGuard(const T& t) noexcept {
         Init(&t);
     }
 
-    inline TTryGuard(const T* t) noexcept { 
+    inline TTryGuard(const T* t) noexcept {
         Init(t);
     }
 
@@ -143,27 +143,27 @@ public:
         g.T_ = nullptr;
     }
 
-    inline ~TTryGuard() { 
+    inline ~TTryGuard() {
         Release();
     }
 
-    inline void Release() noexcept { 
+    inline void Release() noexcept {
         if (WasAcquired()) {
             TOps::Release(T_);
             T_ = nullptr;
         }
     }
 
-    inline bool WasAcquired() const noexcept { 
+    inline bool WasAcquired() const noexcept {
         return T_ != nullptr;
     }
 
-    explicit inline operator bool() const noexcept { 
+    explicit inline operator bool() const noexcept {
         return WasAcquired();
     }
 
 private:
-    inline void Init(const T* t) noexcept { 
+    inline void Init(const T* t) noexcept {
         T_ = nullptr;
         T* tMutable = const_cast<T*>(t);
         if (TOps::TryAcquire(tMutable)) {
diff --git a/util/system/hostname.cpp b/util/system/hostname.cpp
index 397f64bae9..386f646d6b 100644
--- a/util/system/hostname.cpp
+++ b/util/system/hostname.cpp
@@ -29,7 +29,7 @@ namespace {
             HostName = hostNameBuf.Data();
         }
 
-        TString HostName; 
+        TString HostName;
     };
 
     struct TFQDNHostNameHolder {
@@ -60,11 +60,11 @@ namespace {
             FQDNHostName.to_lower();
         }
 
-        TString FQDNHostName; 
+        TString FQDNHostName;
     };
 }
 
-const TString& HostName() { 
+const TString& HostName() {
     return (Singleton<THostNameHolder>())->HostName;
 }
 
@@ -72,7 +72,7 @@ const char* GetHostName() {
     return HostName().data();
 }
 
-const TString& FQDNHostName() { 
+const TString& FQDNHostName() {
     return (Singleton<TFQDNHostNameHolder>())->FQDNHostName;
 }
 
@@ -80,8 +80,8 @@ const char* GetFQDNHostName() {
     return FQDNHostName().data();
 }
 
-bool IsFQDN(const TString& name) { 
-    TString absName = name; 
+bool IsFQDN(const TString& name) {
+    TString absName = name;
     if (!absName.EndsWith('.')) {
         absName.append(".");
     }
diff --git a/util/system/hostname.h b/util/system/hostname.h
index bf8c90fac8..0839ee2b59 100644
--- a/util/system/hostname.h
+++ b/util/system/hostname.h
@@ -3,8 +3,8 @@
 #include <util/generic/fwd.h>
 
 const char* GetHostName();
-const TString& HostName(); 
+const TString& HostName();
 
 const char* GetFQDNHostName();
-const TString& FQDNHostName(); 
-bool IsFQDN(const TString& name); 
+const TString& FQDNHostName();
+bool IsFQDN(const TString& name);
diff --git a/util/system/info.cpp b/util/system/info.cpp
index 9d66c38f0c..cf6681e89a 100644
--- a/util/system/info.cpp
+++ b/util/system/info.cpp
@@ -176,7 +176,7 @@ size_t NSystemInfo::CachedNumberOfCpus() {
     return NCpus;
 }
 
-size_t NSystemInfo::GetPageSize() noexcept { 
+size_t NSystemInfo::GetPageSize() noexcept {
 #if defined(_win_)
     SYSTEM_INFO sysInfo;
     GetSystemInfo(&sysInfo);
diff --git a/util/system/info.h b/util/system/info.h
index 8894f8e6bb..73ebe48a9a 100644
--- a/util/system/info.h
+++ b/util/system/info.h
@@ -6,7 +6,7 @@ namespace NSystemInfo {
     size_t NumberOfCpus();
     size_t CachedNumberOfCpus();
     size_t LoadAverage(double* la, size_t len);
-    size_t GetPageSize() noexcept; 
+    size_t GetPageSize() noexcept;
     size_t TotalMemorySize();
     size_t MaxOpenFiles();
 }
diff --git a/util/system/madvise.cpp b/util/system/madvise.cpp
index ababb94f3f..58c894e3ef 100644
--- a/util/system/madvise.cpp
+++ b/util/system/madvise.cpp
@@ -35,7 +35,7 @@ namespace {
         }
 #else
         if (-1 == madvise(begin, size, flag)) {
-            TString err(LastSystemErrorText()); 
+            TString err(LastSystemErrorText());
             ythrow yexception() << "madvise(" << begin << ", " << size << ", " << flag << ")"
                                 << " returned error: " << err;
         }
diff --git a/util/system/mem_info.cpp b/util/system/mem_info.cpp
index 49e906f006..aa51ae3b16 100644
--- a/util/system/mem_info.cpp
+++ b/util/system/mem_info.cpp
@@ -115,7 +115,7 @@ namespace NMemInfo {
         } else {
             path = TStringBuilder() << TStringBuf("/proc/") << pid << TStringBuf("/statm");
         }
-        const TString stats = TUnbufferedFileInput(path).ReadAll(); 
+        const TString stats = TUnbufferedFileInput(path).ReadAll();
 
         TStringBuf statsiter(stats);
 
@@ -136,7 +136,7 @@ namespace NMemInfo {
         errno = 0;
         if (sysctl((int*)mib, 4, &proc, &size, nullptr, 0) == -1) {
             int err = errno;
-            TString errtxt = LastSystemErrorText(err); 
+            TString errtxt = LastSystemErrorText(err);
             ythrow yexception() << "sysctl({CTL_KERN,KERN_PROC,KERN_PROC_PID,pid},4,proc,&size,NULL,0) returned -1, errno: " << err << " (" << errtxt << ")" << Endl;
         }
 
@@ -151,7 +151,7 @@ namespace NMemInfo {
 
         if (r != sizeof(taskInfo)) {
             int err = errno;
-            TString errtxt = LastSystemErrorText(err); 
+            TString errtxt = LastSystemErrorText(err);
             ythrow yexception() << "proc_pidinfo(pid, PROC_PIDTASKINFO, 0, &taskInfo, sizeof(taskInfo)) returned " << r << ", errno: " << err << " (" << errtxt << ")" << Endl;
         }
         result.VMS = taskInfo.pti_virtual_size;
diff --git a/util/system/mutex.cpp b/util/system/mutex.cpp
index 4b7096cd12..4041402db9 100644
--- a/util/system/mutex.cpp
+++ b/util/system/mutex.cpp
@@ -33,7 +33,7 @@ public:
                 }
             }
 
-            inline ~T() { 
+            inline ~T() {
                 int result = pthread_mutexattr_destroy(&Attr);
                 Y_VERIFY(result == 0, "mutexattr destroy(%s)", LastSystemErrorText(result));
             }
@@ -46,7 +46,7 @@ public:
 #endif
     }
 
-    inline ~TImpl() { 
+    inline ~TImpl() {
 #if defined(_win_)
         DeleteCriticalSection(&Obj);
 #else
@@ -55,7 +55,7 @@ public:
 #endif
     }
 
-    inline void Acquire() noexcept { 
+    inline void Acquire() noexcept {
 #if defined(_win_)
         EnterCriticalSection(&Obj);
 #else
@@ -87,7 +87,7 @@ public:
     }
 #endif // _win_
 
-    inline bool TryAcquire() noexcept { 
+    inline bool TryAcquire() noexcept {
 #if defined(_win_)
         return TryEnterCriticalSectionInt(&Obj);
 #else
@@ -99,7 +99,7 @@ public:
 #endif
     }
 
-    inline void Release() noexcept { 
+    inline void Release() noexcept {
 #if defined(_win_)
         LeaveCriticalSection(&Obj);
 #else
@@ -108,7 +108,7 @@ public:
 #endif
     }
 
-    inline void* Handle() const noexcept { 
+    inline void* Handle() const noexcept {
         return (void*)&Obj;
     }
 
diff --git a/util/system/mutex.h b/util/system/mutex.h
index 02cd05586c..032630d134 100644
--- a/util/system/mutex.h
+++ b/util/system/mutex.h
@@ -8,14 +8,14 @@
 
 class TFakeMutex: public TNonCopyable {
 public:
-    inline void Acquire() noexcept { 
+    inline void Acquire() noexcept {
     }
 
-    inline bool TryAcquire() noexcept { 
+    inline bool TryAcquire() noexcept {
         return true;
     }
 
-    inline void Release() noexcept { 
+    inline void Release() noexcept {
     }
 
     inline void lock() noexcept {
@@ -39,9 +39,9 @@ public:
     TMutex(TMutex&&);
     ~TMutex();
 
-    void Acquire() noexcept; 
-    bool TryAcquire() noexcept; 
-    void Release() noexcept; 
+    void Acquire() noexcept;
+    bool TryAcquire() noexcept;
+    void Release() noexcept;
 
     inline void lock() noexcept {
         Acquire();
@@ -56,7 +56,7 @@ public:
     }
 
     //return opaque pointer to real handler
-    void* Handle() const noexcept; 
+    void* Handle() const noexcept;
 
 private:
     class TImpl;
diff --git a/util/system/pipe.cpp b/util/system/pipe.cpp
index fb3d8229a0..a543bd7472 100644
--- a/util/system/pipe.cpp
+++ b/util/system/pipe.cpp
@@ -3,7 +3,7 @@
 #include <util/stream/output.h>
 #include <util/generic/yexception.h>
 
-ssize_t TPipeHandle::Read(void* buffer, size_t byteCount) const noexcept { 
+ssize_t TPipeHandle::Read(void* buffer, size_t byteCount) const noexcept {
 #ifdef _win_
     return recv(Fd_, (char*)buffer, byteCount, 0);
 #else
@@ -11,7 +11,7 @@ ssize_t TPipeHandle::Read(void* buffer, size_t byteCount) const noexcept {
 #endif
 }
 
-ssize_t TPipeHandle::Write(const void* buffer, size_t byteCount) const noexcept { 
+ssize_t TPipeHandle::Write(const void* buffer, size_t byteCount) const noexcept {
 #ifdef _win_
     return send(Fd_, (const char*)buffer, byteCount, 0);
 #else
@@ -19,7 +19,7 @@ ssize_t TPipeHandle::Write(const void* buffer, size_t byteCount) const noexcept
 #endif
 }
 
-bool TPipeHandle::Close() noexcept { 
+bool TPipeHandle::Close() noexcept {
     bool ok = true;
     if (Fd_ != INVALID_PIPEHANDLE) {
 #ifdef _win_
@@ -94,7 +94,7 @@ public:
         }
     }
 
-    TPipeHandle& GetHandle() noexcept { 
+    TPipeHandle& GetHandle() noexcept {
         return Handle_;
     }
 
@@ -134,11 +134,11 @@ void TPipe::Close() {
     Impl_->Close();
 }
 
-PIPEHANDLE TPipe::GetHandle() const noexcept { 
+PIPEHANDLE TPipe::GetHandle() const noexcept {
     return Impl_->GetHandle();
 }
 
-bool TPipe::IsOpen() const noexcept { 
+bool TPipe::IsOpen() const noexcept {
     return Impl_->IsOpen();
 }
 
diff --git a/util/system/pipe.h b/util/system/pipe.h
index 92dd33362f..75d0360049 100644
--- a/util/system/pipe.h
+++ b/util/system/pipe.h
@@ -17,42 +17,42 @@ using PIPEHANDLE = SOCKET;
 /// Pipe-like object: pipe on POSIX and socket on windows
 class TPipeHandle: public TNonCopyable {
 public:
-    inline TPipeHandle() noexcept 
+    inline TPipeHandle() noexcept
         : Fd_(INVALID_PIPEHANDLE)
     {
     }
 
-    inline TPipeHandle(PIPEHANDLE fd) noexcept 
+    inline TPipeHandle(PIPEHANDLE fd) noexcept
         : Fd_(fd)
     {
     }
 
-    inline ~TPipeHandle() { 
+    inline ~TPipeHandle() {
         Close();
     }
 
-    bool Close() noexcept; 
+    bool Close() noexcept;
 
-    inline PIPEHANDLE Release() noexcept { 
+    inline PIPEHANDLE Release() noexcept {
         PIPEHANDLE ret = Fd_;
         Fd_ = INVALID_PIPEHANDLE;
         return ret;
     }
 
-    inline void Swap(TPipeHandle& r) noexcept { 
+    inline void Swap(TPipeHandle& r) noexcept {
         DoSwap(Fd_, r.Fd_);
     }
 
-    inline operator PIPEHANDLE() const noexcept { 
+    inline operator PIPEHANDLE() const noexcept {
         return Fd_;
     }
 
-    inline bool IsOpen() const noexcept { 
+    inline bool IsOpen() const noexcept {
         return Fd_ != INVALID_PIPEHANDLE;
     }
 
-    ssize_t Read(void* buffer, size_t byteCount) const noexcept; 
-    ssize_t Write(const void* buffer, size_t byteCount) const noexcept; 
+    ssize_t Read(void* buffer, size_t byteCount) const noexcept;
+    ssize_t Write(const void* buffer, size_t byteCount) const noexcept;
 
     // Only CloseOnExec is supported
     static void Pipe(TPipeHandle& reader, TPipeHandle& writer, EOpenMode mode = 0);
@@ -66,12 +66,12 @@ public:
     TPipe();
     /// Takes ownership of handle, so closes it when the last holder of descriptor dies.
     explicit TPipe(PIPEHANDLE fd);
-    ~TPipe(); 
+    ~TPipe();
 
     void Close();
 
-    bool IsOpen() const noexcept; 
-    PIPEHANDLE GetHandle() const noexcept; 
+    bool IsOpen() const noexcept;
+    PIPEHANDLE GetHandle() const noexcept;
 
     size_t Read(void* buf, size_t len) const;
     size_t Write(const void* buf, size_t len) const;
diff --git a/util/system/progname.cpp b/util/system/progname.cpp
index 237f7e3082..2c29119320 100644
--- a/util/system/progname.cpp
+++ b/util/system/progname.cpp
@@ -13,11 +13,11 @@ namespace {
         {
         }
 
-        TString ProgName; 
+        TString ProgName;
     };
 }
 
-const TString& GetProgramName() { 
+const TString& GetProgramName() {
     return Singleton<TProgramNameHolder>()->ProgName;
 }
 
diff --git a/util/system/progname.h b/util/system/progname.h
index b02cdf230d..e5e2a0eee2 100644
--- a/util/system/progname.h
+++ b/util/system/progname.h
@@ -9,5 +9,5 @@ void SetProgramName(const char* argv0);
         SetProgramName(argv[0]); \
     } while (0)
 
-/// guaranted return the same immutable instance of TString 
-const TString& GetProgramName(); 
+/// guaranted return the same immutable instance of TString
+const TString& GetProgramName();
diff --git a/util/system/progname_ut.cpp b/util/system/progname_ut.cpp
index d058647fac..11f3d9308b 100644
--- a/util/system/progname_ut.cpp
+++ b/util/system/progname_ut.cpp
@@ -4,11 +4,11 @@
 
 Y_UNIT_TEST_SUITE(TProgramNameTest) {
     Y_UNIT_TEST(TestIt) {
-        TString progName = GetProgramName(); 
+        TString progName = GetProgramName();
 
         try {
             UNIT_ASSERT(
-                progName.find("ut_util") != TString::npos || progName.find("util-system_ut") != TString::npos || progName.find("util-system-ut") != TString::npos); 
+                progName.find("ut_util") != TString::npos || progName.find("util-system_ut") != TString::npos || progName.find("util-system-ut") != TString::npos);
         } catch (...) {
             Cerr << progName << Endl;
 
diff --git a/util/system/protect.cpp b/util/system/protect.cpp
index 8786f00eab..bbb8d410df 100644
--- a/util/system/protect.cpp
+++ b/util/system/protect.cpp
@@ -1,7 +1,7 @@
 #include "protect.h"
 
 #include <util/generic/yexception.h>
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 #include <util/stream/output.h>
 
 #include "yassert.h"
@@ -15,7 +15,7 @@
 #endif
 
 static TString ModeToString(const EProtectMemory mode) {
-    TString strMode; 
+    TString strMode;
     if (mode == PM_NONE) {
         return "PM_NONE";
     }
diff --git a/util/system/rwlock.cpp b/util/system/rwlock.cpp
index 8785f006d6..bb3dcbf188 100644
--- a/util/system/rwlock.cpp
+++ b/util/system/rwlock.cpp
@@ -14,17 +14,17 @@
 class TRWMutex::TImpl {
 public:
     TImpl();
-    ~TImpl(); 
+    ~TImpl();
 
-    void AcquireRead() noexcept; 
-    bool TryAcquireRead() noexcept; 
-    void ReleaseRead() noexcept; 
+    void AcquireRead() noexcept;
+    bool TryAcquireRead() noexcept;
+    void ReleaseRead() noexcept;
 
-    void AcquireWrite() noexcept; 
-    bool TryAcquireWrite() noexcept; 
-    void ReleaseWrite() noexcept; 
+    void AcquireWrite() noexcept;
+    bool TryAcquireWrite() noexcept;
+    void ReleaseWrite() noexcept;
 
-    void Release() noexcept; 
+    void Release() noexcept;
 
 private:
     TMutex Lock_;
@@ -40,12 +40,12 @@ TRWMutex::TImpl::TImpl()
 {
 }
 
-TRWMutex::TImpl::~TImpl() { 
+TRWMutex::TImpl::~TImpl() {
     Y_VERIFY(State_ == 0, "failure, State_ != 0");
     Y_VERIFY(BlockedWriters_ == 0, "failure, BlockedWriters_ != 0");
 }
 
-void TRWMutex::TImpl::AcquireRead() noexcept { 
+void TRWMutex::TImpl::AcquireRead() noexcept {
     with_lock (Lock_) {
         while (BlockedWriters_ || State_ < 0) {
             ReadCond_.Wait(Lock_);
@@ -57,7 +57,7 @@ void TRWMutex::TImpl::AcquireRead() noexcept {
     ReadCond_.Signal();
 }
 
-bool TRWMutex::TImpl::TryAcquireRead() noexcept { 
+bool TRWMutex::TImpl::TryAcquireRead() noexcept {
     with_lock (Lock_) {
         if (BlockedWriters_ || State_ < 0) {
             return false;
@@ -69,7 +69,7 @@ bool TRWMutex::TImpl::TryAcquireRead() noexcept {
     return true;
 }
 
-void TRWMutex::TImpl::ReleaseRead() noexcept { 
+void TRWMutex::TImpl::ReleaseRead() noexcept {
     Lock_.Acquire();
 
     if (--State_ > 0) {
@@ -82,7 +82,7 @@ void TRWMutex::TImpl::ReleaseRead() noexcept {
     }
 }
 
-void TRWMutex::TImpl::AcquireWrite() noexcept { 
+void TRWMutex::TImpl::AcquireWrite() noexcept {
     with_lock (Lock_) {
         while (State_ != 0) {
             ++BlockedWriters_;
@@ -94,7 +94,7 @@ void TRWMutex::TImpl::AcquireWrite() noexcept {
     }
 }
 
-bool TRWMutex::TImpl::TryAcquireWrite() noexcept { 
+bool TRWMutex::TImpl::TryAcquireWrite() noexcept {
     with_lock (Lock_) {
         if (State_ != 0) {
             return false;
@@ -106,7 +106,7 @@ bool TRWMutex::TImpl::TryAcquireWrite() noexcept {
     return true;
 }
 
-void TRWMutex::TImpl::ReleaseWrite() noexcept { 
+void TRWMutex::TImpl::ReleaseWrite() noexcept {
     Lock_.Acquire();
     State_ = 0;
 
@@ -119,7 +119,7 @@ void TRWMutex::TImpl::ReleaseWrite() noexcept {
     }
 }
 
-void TRWMutex::TImpl::Release() noexcept { 
+void TRWMutex::TImpl::Release() noexcept {
     Lock_.Acquire();
 
     if (State_ > 0) {
@@ -147,17 +147,17 @@ void TRWMutex::TImpl::Release() noexcept {
 class TRWMutex::TImpl {
 public:
     TImpl();
-    ~TImpl(); 
+    ~TImpl();
 
-    void AcquireRead() noexcept; 
-    bool TryAcquireRead() noexcept; 
-    void ReleaseRead() noexcept; 
+    void AcquireRead() noexcept;
+    bool TryAcquireRead() noexcept;
+    void ReleaseRead() noexcept;
 
-    void AcquireWrite() noexcept; 
-    bool TryAcquireWrite() noexcept; 
-    void ReleaseWrite() noexcept; 
+    void AcquireWrite() noexcept;
+    bool TryAcquireWrite() noexcept;
+    void ReleaseWrite() noexcept;
 
-    void Release() noexcept; 
+    void Release() noexcept;
 
 private:
     pthread_rwlock_t Lock_;
@@ -170,44 +170,44 @@ TRWMutex::TImpl::TImpl() {
     }
 }
 
-TRWMutex::TImpl::~TImpl() { 
+TRWMutex::TImpl::~TImpl() {
     const int result = pthread_rwlock_destroy(&Lock_);
     Y_VERIFY(result == 0, "rwlock destroy failed (%s)", LastSystemErrorText(result));
 }
 
-void TRWMutex::TImpl::AcquireRead() noexcept { 
+void TRWMutex::TImpl::AcquireRead() noexcept {
     const int result = pthread_rwlock_rdlock(&Lock_);
     Y_VERIFY(result == 0, "rwlock rdlock failed (%s)", LastSystemErrorText(result));
 }
 
-bool TRWMutex::TImpl::TryAcquireRead() noexcept { 
+bool TRWMutex::TImpl::TryAcquireRead() noexcept {
     const int result = pthread_rwlock_tryrdlock(&Lock_);
     Y_VERIFY(result == 0 || result == EBUSY, "rwlock tryrdlock failed (%s)", LastSystemErrorText(result));
     return result == 0;
 }
 
-void TRWMutex::TImpl::ReleaseRead() noexcept { 
+void TRWMutex::TImpl::ReleaseRead() noexcept {
     const int result = pthread_rwlock_unlock(&Lock_);
     Y_VERIFY(result == 0, "rwlock (read) unlock failed (%s)", LastSystemErrorText(result));
 }
 
-void TRWMutex::TImpl::AcquireWrite() noexcept { 
+void TRWMutex::TImpl::AcquireWrite() noexcept {
     const int result = pthread_rwlock_wrlock(&Lock_);
     Y_VERIFY(result == 0, "rwlock wrlock failed (%s)", LastSystemErrorText(result));
 }
 
-bool TRWMutex::TImpl::TryAcquireWrite() noexcept { 
+bool TRWMutex::TImpl::TryAcquireWrite() noexcept {
     const int result = pthread_rwlock_trywrlock(&Lock_);
     Y_VERIFY(result == 0 || result == EBUSY, "rwlock trywrlock failed (%s)", LastSystemErrorText(result));
     return result == 0;
 }
 
-void TRWMutex::TImpl::ReleaseWrite() noexcept { 
+void TRWMutex::TImpl::ReleaseWrite() noexcept {
     const int result = pthread_rwlock_unlock(&Lock_);
     Y_VERIFY(result == 0, "rwlock (write) unlock failed (%s)", LastSystemErrorText(result));
 }
 
-void TRWMutex::TImpl::Release() noexcept { 
+void TRWMutex::TImpl::Release() noexcept {
     const int result = pthread_rwlock_unlock(&Lock_);
     Y_VERIFY(result == 0, "rwlock unlock failed (%s)", LastSystemErrorText(result));
 }
@@ -221,30 +221,30 @@ TRWMutex::TRWMutex()
 
 TRWMutex::~TRWMutex() = default;
 
-void TRWMutex::AcquireRead() noexcept { 
+void TRWMutex::AcquireRead() noexcept {
     Impl_->AcquireRead();
 }
 
-bool TRWMutex::TryAcquireRead() noexcept { 
+bool TRWMutex::TryAcquireRead() noexcept {
     return Impl_->TryAcquireRead();
 }
 
-void TRWMutex::ReleaseRead() noexcept { 
+void TRWMutex::ReleaseRead() noexcept {
     Impl_->ReleaseRead();
 }
 
-void TRWMutex::AcquireWrite() noexcept { 
+void TRWMutex::AcquireWrite() noexcept {
     Impl_->AcquireWrite();
 }
 
-bool TRWMutex::TryAcquireWrite() noexcept { 
+bool TRWMutex::TryAcquireWrite() noexcept {
     return Impl_->TryAcquireWrite();
 }
 
-void TRWMutex::ReleaseWrite() noexcept { 
+void TRWMutex::ReleaseWrite() noexcept {
     Impl_->ReleaseWrite();
 }
 
-void TRWMutex::Release() noexcept { 
+void TRWMutex::Release() noexcept {
     Impl_->Release();
 }
diff --git a/util/system/rwlock.h b/util/system/rwlock.h
index b476837c92..0bb9b3fe1c 100644
--- a/util/system/rwlock.h
+++ b/util/system/rwlock.h
@@ -8,17 +8,17 @@
 class TRWMutex {
 public:
     TRWMutex();
-    ~TRWMutex(); 
+    ~TRWMutex();
 
-    void AcquireRead() noexcept; 
-    bool TryAcquireRead() noexcept; 
-    void ReleaseRead() noexcept; 
+    void AcquireRead() noexcept;
+    bool TryAcquireRead() noexcept;
+    void ReleaseRead() noexcept;
 
-    void AcquireWrite() noexcept; 
-    bool TryAcquireWrite() noexcept; 
-    void ReleaseWrite() noexcept; 
+    void AcquireWrite() noexcept;
+    bool TryAcquireWrite() noexcept;
+    void ReleaseWrite() noexcept;
 
-    void Release() noexcept; 
+    void Release() noexcept;
 
 private:
     class TImpl;
@@ -27,36 +27,36 @@ private:
 
 template <class T>
 struct TReadGuardOps {
-    static inline void Acquire(T* t) noexcept { 
+    static inline void Acquire(T* t) noexcept {
         t->AcquireRead();
     }
 
-    static inline void Release(T* t) noexcept { 
+    static inline void Release(T* t) noexcept {
         t->ReleaseRead();
     }
 };
 
 template <class T>
 struct TTryReadGuardOps: public TReadGuardOps<T> {
-    static inline bool TryAcquire(T* t) noexcept { 
+    static inline bool TryAcquire(T* t) noexcept {
         return t->TryAcquireRead();
     }
 };
 
 template <class T>
 struct TWriteGuardOps {
-    static inline void Acquire(T* t) noexcept { 
+    static inline void Acquire(T* t) noexcept {
         t->AcquireWrite();
     }
 
-    static inline void Release(T* t) noexcept { 
+    static inline void Release(T* t) noexcept {
         t->ReleaseWrite();
     }
 };
 
 template <class T>
 struct TTryWriteGuardOps: public TWriteGuardOps<T> {
-    static inline bool TryAcquire(T* t) noexcept { 
+    static inline bool TryAcquire(T* t) noexcept {
         return t->TryAcquireWrite();
     }
 };
diff --git a/util/system/sem.cpp b/util/system/sem.cpp
index 885ad8a255..4a93b903b5 100644
--- a/util/system/sem.cpp
+++ b/util/system/sem.cpp
@@ -104,7 +104,7 @@ namespace {
 #endif
         }
 
-        inline ~TSemaphoreImpl() { 
+        inline ~TSemaphoreImpl() {
 #ifdef _win_
             ::CloseHandle(Handle);
 #else
@@ -119,7 +119,7 @@ namespace {
 #endif
         }
 
-        inline void Release() noexcept { 
+        inline void Release() noexcept {
 #ifdef _win_
             ::ReleaseSemaphore(Handle, 1, 0);
 #else
@@ -135,7 +135,7 @@ namespace {
 
         //The UNIX semaphore object does not support a timed "wait", and
         //hence to maintain consistancy, for win32 case we use INFINITE or 0 timeout.
-        inline void Acquire() noexcept { 
+        inline void Acquire() noexcept {
 #ifdef _win_
             Y_VERIFY(::WaitForSingleObject(Handle, INFINITE) == WAIT_OBJECT_0, "can not acquire semaphore");
 #else
@@ -149,7 +149,7 @@ namespace {
 #endif
         }
 
-        inline bool TryAcquire() noexcept { 
+        inline bool TryAcquire() noexcept {
 #ifdef _win_
             // zero-second time-out interval
             // WAIT_OBJECT_0: current free count > 0
@@ -169,8 +169,8 @@ namespace {
 
 #if defined(_unix_)
     /*
-    Disable errors/warnings about deprecated sem_* in Darwin 
-*/ 
+    Disable errors/warnings about deprecated sem_* in Darwin
+*/
     #ifdef _darwin_
     Y_PRAGMA_DIAGNOSTIC_PUSH
     Y_PRAGMA_NO_DEPRECATED
@@ -182,19 +182,19 @@ namespace {
             }
         }
 
-        inline ~TPosixSemaphore() { 
+        inline ~TPosixSemaphore() {
             Y_VERIFY(sem_destroy(&S_) == 0, "semaphore destroy failed");
         }
 
-        inline void Acquire() noexcept { 
+        inline void Acquire() noexcept {
             Y_VERIFY(sem_wait(&S_) == 0, "semaphore acquire failed");
         }
 
-        inline void Release() noexcept { 
+        inline void Release() noexcept {
             Y_VERIFY(sem_post(&S_) == 0, "semaphore release failed");
         }
 
-        inline bool TryAcquire() noexcept { 
+        inline bool TryAcquire() noexcept {
             if (sem_trywait(&S_)) {
                 Y_VERIFY(errno == EAGAIN, "semaphore try wait failed");
 
@@ -227,15 +227,15 @@ TSemaphore::TSemaphore(const char* name, ui32 maxFreeCount)
 
 TSemaphore::~TSemaphore() = default;
 
-void TSemaphore::Release() noexcept { 
+void TSemaphore::Release() noexcept {
     Impl_->Release();
 }
 
-void TSemaphore::Acquire() noexcept { 
+void TSemaphore::Acquire() noexcept {
     Impl_->Acquire();
 }
 
-bool TSemaphore::TryAcquire() noexcept { 
+bool TSemaphore::TryAcquire() noexcept {
     return Impl_->TryAcquire();
 }
 
@@ -248,10 +248,10 @@ public:
     }
 };
 #else
-class TFastSemaphore::TImpl: public TString, public TSemaphoreImpl { 
+class TFastSemaphore::TImpl: public TString, public TSemaphoreImpl {
 public:
     inline TImpl(ui32 n)
-        : TString(ToString(RandomNumber<ui64>())) 
+        : TString(ToString(RandomNumber<ui64>()))
         , TSemaphoreImpl(c_str(), n)
     {
     }
@@ -265,14 +265,14 @@ TFastSemaphore::TFastSemaphore(ui32 maxFreeCount)
 
 TFastSemaphore::~TFastSemaphore() = default;
 
-void TFastSemaphore::Release() noexcept { 
+void TFastSemaphore::Release() noexcept {
     Impl_->Release();
 }
 
-void TFastSemaphore::Acquire() noexcept { 
+void TFastSemaphore::Acquire() noexcept {
     Impl_->Acquire();
 }
 
-bool TFastSemaphore::TryAcquire() noexcept { 
+bool TFastSemaphore::TryAcquire() noexcept {
     return Impl_->TryAcquire();
 }
diff --git a/util/system/sem.h b/util/system/sem.h
index 2dbc5e3db9..0c964ad6b6 100644
--- a/util/system/sem.h
+++ b/util/system/sem.h
@@ -8,17 +8,17 @@
 class TSemaphore {
 public:
     TSemaphore(const char* name, ui32 maxFreeCount);
-    ~TSemaphore(); 
+    ~TSemaphore();
 
     //Increase the semaphore counter.
-    void Release() noexcept; 
+    void Release() noexcept;
 
     //Keep a thread held while the semaphore counter is equal 0.
-    void Acquire() noexcept; 
+    void Acquire() noexcept;
 
     //Try to enter the semaphore gate. A non-blocking variant of Acquire.
     //Returns 'true' if the semaphore counter decreased
-    bool TryAcquire() noexcept; 
+    bool TryAcquire() noexcept;
 
 private:
     class TImpl;
@@ -29,11 +29,11 @@ private:
 class TFastSemaphore {
 public:
     TFastSemaphore(ui32 maxFreeCount);
-    ~TFastSemaphore(); 
+    ~TFastSemaphore();
 
-    void Release() noexcept; 
-    void Acquire() noexcept; 
-    bool TryAcquire() noexcept; 
+    void Release() noexcept;
+    void Acquire() noexcept;
+    bool TryAcquire() noexcept;
 
 private:
     class TImpl;
diff --git a/util/system/shellcommand.cpp b/util/system/shellcommand.cpp
index e8da24f7ef..b1989b5c8c 100644
--- a/util/system/shellcommand.cpp
+++ b/util/system/shellcommand.cpp
@@ -115,21 +115,21 @@ using REALPIPEHANDLE = HANDLE;
 class TRealPipeHandle
     : public TNonCopyable {
 public:
-    inline TRealPipeHandle() noexcept 
+    inline TRealPipeHandle() noexcept
         : Fd_(INVALID_REALPIPEHANDLE)
     {
     }
 
-    inline TRealPipeHandle(REALPIPEHANDLE fd) noexcept 
+    inline TRealPipeHandle(REALPIPEHANDLE fd) noexcept
         : Fd_(fd)
     {
     }
 
-    inline ~TRealPipeHandle() { 
+    inline ~TRealPipeHandle() {
         Close();
     }
 
-    bool Close() noexcept { 
+    bool Close() noexcept {
         bool ok = true;
         if (Fd_ != INVALID_REALPIPEHANDLE)
             ok = CloseHandle(Fd_);
@@ -137,31 +137,31 @@ public:
         return ok;
     }
 
-    inline REALPIPEHANDLE Release() noexcept { 
+    inline REALPIPEHANDLE Release() noexcept {
         REALPIPEHANDLE ret = Fd_;
         Fd_ = INVALID_REALPIPEHANDLE;
         return ret;
     }
 
-    inline void Swap(TRealPipeHandle& r) noexcept { 
+    inline void Swap(TRealPipeHandle& r) noexcept {
         DoSwap(Fd_, r.Fd_);
     }
 
-    inline operator REALPIPEHANDLE() const noexcept { 
+    inline operator REALPIPEHANDLE() const noexcept {
         return Fd_;
     }
 
-    inline bool IsOpen() const noexcept { 
+    inline bool IsOpen() const noexcept {
         return Fd_ != INVALID_REALPIPEHANDLE;
     }
 
-    ssize_t Read(void* buffer, size_t byteCount) const noexcept { 
+    ssize_t Read(void* buffer, size_t byteCount) const noexcept {
         DWORD doneBytes;
         if (!ReadFile(Fd_, buffer, byteCount, &doneBytes, nullptr))
             return -1;
         return doneBytes;
     }
-    ssize_t Write(const void* buffer, size_t byteCount) const noexcept { 
+    ssize_t Write(const void* buffer, size_t byteCount) const noexcept {
         DWORD doneBytes;
         if (!WriteFile(Fd_, buffer, byteCount, &doneBytes, nullptr))
             return -1;
@@ -191,17 +191,17 @@ class TShellCommand::TImpl
     : public TAtomicRefCount<TShellCommand::TImpl> {
 private:
     TPid Pid;
-    TString Command; 
-    TList<TString> Arguments; 
-    TString WorkDir; 
+    TString Command;
+    TList<TString> Arguments;
+    TString WorkDir;
     TAtomic ExecutionStatus; // TShellCommand::ECommandStatus
     TMaybe<int> ExitCode;
     IInputStream* InputStream;
     IOutputStream* OutputStream;
     IOutputStream* ErrorStream;
-    TString CollectedOutput; 
-    TString CollectedError; 
-    TString InternalError; 
+    TString CollectedOutput;
+    TString CollectedError;
+    TString InternalError;
     TThread* WatchThread;
     TMutex TerminateMutex;
     TFileHandle InputHandle;
@@ -224,7 +224,7 @@ private:
     TShellCommandOptions::EHandleMode ErrorMode = TShellCommandOptions::HANDLE_STREAM;
 
     TShellCommandOptions::TUserOptions User;
-    THashMap<TString, TString> Environment; 
+    THashMap<TString, TString> Environment;
     int Nice = 0;
     std::function<void()> FuncAfterFork = {};
 
@@ -280,7 +280,7 @@ private:
 #endif
 
 public:
-    inline TImpl(const TStringBuf cmd, const TList<TString>& args, const TShellCommandOptions& options, const TString& workdir) 
+    inline TImpl(const TStringBuf cmd, const TList<TString>& args, const TShellCommandOptions& options, const TString& workdir)
         : Pid(0)
         , Command(ToString(cmd))
         , Arguments(args)
@@ -337,21 +337,21 @@ public:
         Arguments.push_back(ToString(argument));
     }
 
-    inline const TString& GetOutput() const { 
+    inline const TString& GetOutput() const {
         if (AtomicGet(ExecutionStatus) == SHELL_RUNNING) {
             ythrow yexception() << "You cannot retrieve output while process is running.";
         }
         return CollectedOutput;
     }
 
-    inline const TString& GetError() const { 
+    inline const TString& GetError() const {
         if (AtomicGet(ExecutionStatus) == SHELL_RUNNING) {
             ythrow yexception() << "You cannot retrieve output while process is running.";
         }
         return CollectedError;
     }
 
-    inline const TString& GetInternalError() const { 
+    inline const TString& GetInternalError() const {
         if (AtomicGet(ExecutionStatus) != SHELL_INTERNAL_ERROR) {
             ythrow yexception() << "Internal error hasn't occured so can't be retrieved.";
         }
@@ -555,10 +555,10 @@ void TShellCommand::TImpl::StartProcess(TShellCommand::TImpl::TPipes& pipes) {
     }
 
     PROCESS_INFORMATION process_info;
-    // TString cmd = "cmd /U" + TUtf16String can be used to read unicode messages from cmd 
+    // TString cmd = "cmd /U" + TUtf16String can be used to read unicode messages from cmd
     // /A - ansi charset /Q - echo off, /C - command, /Q - special quotes
-    TString qcmd = GetQuotedCommand(); 
-    TString cmd = UseShell ? "cmd /A /Q /S /C \"" + qcmd + "\"" : qcmd; 
+    TString qcmd = GetQuotedCommand();
+    TString cmd = UseShell ? "cmd /A /Q /S /C \"" + qcmd + "\"" : qcmd;
     // winapi can modify command text, copy it
 
     Y_ENSURE_EX(cmd.size() < MAX_COMMAND_LINE, yexception() << "Command is too long (length=" << cmd.size() << ")");
@@ -574,7 +574,7 @@ void TShellCommand::TImpl::StartProcess(TShellCommand::TImpl::TPipes& pipes) {
     }
 
     void* lpEnvironment = nullptr;
-    TString env; 
+    TString env;
     if (!Environment.empty()) {
         for (auto e = Environment.begin(); e != Environment.end(); ++e) {
             env += e->first + '=' + e->second + '\0';
@@ -627,21 +627,21 @@ void TShellCommand::TImpl::StartProcess(TShellCommand::TImpl::TPipes& pipes) {
 }
 #endif
 
-void ShellQuoteArg(TString& dst, TStringBuf argument) { 
+void ShellQuoteArg(TString& dst, TStringBuf argument) {
     dst.append("\"");
     TStringBuf l, r;
-    while (argument.TrySplit('"', l, r)) { 
+    while (argument.TrySplit('"', l, r)) {
         dst.append(l);
         dst.append("\\\"");
-        argument = r; 
+        argument = r;
     }
-    dst.append(argument); 
+    dst.append(argument);
     dst.append("\"");
 }
 
-void ShellQuoteArgSp(TString& dst, TStringBuf argument) { 
+void ShellQuoteArgSp(TString& dst, TStringBuf argument) {
     dst.append(' ');
-    ShellQuoteArg(dst, argument); 
+    ShellQuoteArg(dst, argument);
 }
 
 bool ArgNeedsQuotes(TStringBuf arg) noexcept {
@@ -651,8 +651,8 @@ bool ArgNeedsQuotes(TStringBuf arg) noexcept {
     return arg.find_first_of(" \"\'\t&()*<>\\`^|") != TString::npos;
 }
 
-TString TShellCommand::TImpl::GetQuotedCommand() const { 
-    TString quoted = Command; /// @todo command itself should be quoted too 
+TString TShellCommand::TImpl::GetQuotedCommand() const {
+    TString quoted = Command; /// @todo command itself should be quoted too
     for (const auto& argument : Arguments) {
         // Don't add unnecessary quotes. It's especially important for the windows with a 32k command line length limit.
         if (QuoteArguments && ArgNeedsQuotes(argument)) {
@@ -783,8 +783,8 @@ void TShellCommand::TImpl::Run() {
     }
 
     /* arguments holders */
-    TString shellArg; 
-    TVector<char*> qargv; 
+    TString shellArg;
+    TVector<char*> qargv;
     /*
       Following "const_cast"s are safe:
       http://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html
@@ -807,8 +807,8 @@ void TShellCommand::TImpl::Run() {
 
     qargv.push_back(nullptr);
 
-    TVector<TString> envHolder; 
-    TVector<char*> envp; 
+    TVector<TString> envHolder;
+    TVector<char*> envp;
     if (!Environment.empty()) {
         for (auto& env : Environment) {
             envHolder.emplace_back(env.first + '=' + env.second);
@@ -1121,14 +1121,14 @@ void TShellCommand::TImpl::Communicate(TProcessInfo* pi) {
     TerminateIsRequired(pi);
 }
 
-TShellCommand::TShellCommand(const TStringBuf cmd, const TList<TString>& args, const TShellCommandOptions& options, 
-                             const TString& workdir) 
+TShellCommand::TShellCommand(const TStringBuf cmd, const TList<TString>& args, const TShellCommandOptions& options,
+                             const TString& workdir)
     : Impl(new TImpl(cmd, args, options, workdir))
 {
 }
 
-TShellCommand::TShellCommand(const TStringBuf cmd, const TShellCommandOptions& options, const TString& workdir) 
-    : Impl(new TImpl(cmd, TList<TString>(), options, workdir)) 
+TShellCommand::TShellCommand(const TStringBuf cmd, const TShellCommandOptions& options, const TString& workdir)
+    : Impl(new TImpl(cmd, TList<TString>(), options, workdir))
 {
 }
 
@@ -1139,15 +1139,15 @@ TShellCommand& TShellCommand::operator<<(const TStringBuf argument) {
     return *this;
 }
 
-const TString& TShellCommand::GetOutput() const { 
+const TString& TShellCommand::GetOutput() const {
     return Impl->GetOutput();
 }
 
-const TString& TShellCommand::GetError() const { 
+const TString& TShellCommand::GetError() const {
     return Impl->GetError();
 }
 
-const TString& TShellCommand::GetInternalError() const { 
+const TString& TShellCommand::GetInternalError() const {
     return Impl->GetInternalError();
 }
 
diff --git a/util/system/shellcommand.h b/util/system/shellcommand.h
index c2e7a4701c..8730627fe5 100644
--- a/util/system/shellcommand.h
+++ b/util/system/shellcommand.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <util/generic/noncopyable.h>
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 #include <util/generic/list.h>
 #include <util/generic/hash.h>
 #include <util/generic/strbuf.h>
@@ -17,9 +17,9 @@
 class TShellCommandOptions {
 public:
     struct TUserOptions {
-        TString Name; 
+        TString Name;
 #if defined(_win_)
-        TString Password; 
+        TString Password;
 #endif
 #if defined(_unix_)
         /**
@@ -38,7 +38,7 @@ public:
     };
 
 public:
-    inline TShellCommandOptions() noexcept 
+    inline TShellCommandOptions() noexcept
         : ClearSignalMask(false)
         , CloseAllFdsOnExec(false)
         , AsyncMode(false)
@@ -59,7 +59,7 @@ public:
     {
     }
 
-    inline TShellCommandOptions& SetNice(int value) noexcept { 
+    inline TShellCommandOptions& SetNice(int value) noexcept {
         Nice = value;
 
         return *this;
@@ -318,7 +318,7 @@ public:
     IOutputStream* OutputStream;
     IOutputStream* ErrorStream;
     TUserOptions User;
-    THashMap<TString, TString> Environment; 
+    THashMap<TString, TString> Environment;
     int Nice = 0;
 
     static const size_t DefaultSyncPollDelay = 1000; // ms
@@ -351,10 +351,10 @@ public:
      * @param options execution options
      * @todo store entire options structure
      */
-    TShellCommand(const TStringBuf cmd, const TList<TString>& args, const TShellCommandOptions& options = TShellCommandOptions(), 
-                  const TString& workdir = TString()); 
-    TShellCommand(const TStringBuf cmd, const TShellCommandOptions& options = TShellCommandOptions(), const TString& workdir = TString()); 
-    ~TShellCommand(); 
+    TShellCommand(const TStringBuf cmd, const TList<TString>& args, const TShellCommandOptions& options = TShellCommandOptions(),
+                  const TString& workdir = TString());
+    TShellCommand(const TStringBuf cmd, const TShellCommandOptions& options = TShellCommandOptions(), const TString& workdir = TString());
+    ~TShellCommand();
 
 public:
     /**
@@ -372,7 +372,7 @@ public:
      *
      * @return collected output
      */
-    const TString& GetOutput() const; 
+    const TString& GetOutput() const;
 
     /**
      * @brief return the collected error output from the command.
@@ -380,7 +380,7 @@ public:
      *
      * @return collected error output
      */
-    const TString& GetError() const; 
+    const TString& GetError() const;
 
     /**
      * @brief return the internal error occured while watching
@@ -389,7 +389,7 @@ public:
      *
      * @return error text
      */
-    const TString& GetInternalError() const; 
+    const TString& GetInternalError() const;
 
     /**
      * @brief get current status of command execution
@@ -476,10 +476,10 @@ private:
 };
 
 /// Appends to dst: quoted arg
-void ShellQuoteArg(TString& dst, TStringBuf arg); 
+void ShellQuoteArg(TString& dst, TStringBuf arg);
 
 /// Appends to dst: space, quoted arg
-void ShellQuoteArgSp(TString& dst, TStringBuf arg); 
+void ShellQuoteArgSp(TString& dst, TStringBuf arg);
 
 /// Returns true if arg should be quoted
 bool ArgNeedsQuotes(TStringBuf arg) noexcept;
diff --git a/util/system/shellcommand_ut.cpp b/util/system/shellcommand_ut.cpp
index 71dd2f2e4d..9d849279d2 100644
--- a/util/system/shellcommand_ut.cpp
+++ b/util/system/shellcommand_ut.cpp
@@ -33,11 +33,11 @@ public:
         Stream_.Reserve(100);
     }
 
-    TString Str() const { 
+    TString Str() const {
         with_lock (Lock_) {
             return Stream_.Str();
         }
-        return TString(); // line for compiler 
+        return TString(); // line for compiler
     }
 
 protected:
@@ -61,7 +61,7 @@ private:
 
 Y_UNIT_TEST_SUITE(TShellQuoteTest) {
     Y_UNIT_TEST(TestQuoteArg) {
-        TString cmd; 
+        TString cmd;
         ShellQuoteArg(cmd, "/pr f/krev/prev.exe");
         ShellQuoteArgSp(cmd, "-DVal=\"W Quotes\"");
         ShellQuoteArgSp(cmd, "-DVal=W Space");
@@ -170,8 +170,8 @@ Y_UNIT_TEST_SUITE(TShellCommandTest) {
     }
     Y_UNIT_TEST(TestQuotes) {
         TShellCommandOptions options;
-        TString input = TString("a\"a a"); 
-        TString output; 
+        TString input = TString("a\"a a");
+        TString output;
         TStringOutput outputStream(output);
         options.SetOutputStream(&outputStream);
         TShellCommand cmd("echo", options);
@@ -202,7 +202,7 @@ Y_UNIT_TEST_SUITE(TShellCommandTest) {
     // 'type con' and 'copy con con' want real console, not stdin, use sort
     Y_UNIT_TEST(TestInput) {
         TShellCommandOptions options;
-        TString input = (TString("a") * 2000).append(NL) * textSize; 
+        TString input = (TString("a") * 2000).append(NL) * textSize;
         TStringInput inputStream(input);
         options.SetInputStream(&inputStream);
         TShellCommand cmd(catCommand, options);
@@ -212,10 +212,10 @@ Y_UNIT_TEST_SUITE(TShellCommandTest) {
     }
     Y_UNIT_TEST(TestOutput) {
         TShellCommandOptions options;
-        TString input = (TString("a") * 2000).append(NL) * textSize; 
+        TString input = (TString("a") * 2000).append(NL) * textSize;
         TStringInput inputStream(input);
         options.SetInputStream(&inputStream);
-        TString output; 
+        TString output;
         TStringOutput outputStream(output);
         options.SetOutputStream(&outputStream);
         TShellCommand cmd(catCommand, options);
@@ -297,7 +297,7 @@ Y_UNIT_TEST_SUITE(TShellCommandTest) {
 #if !defined(_win_)
     // this ut is unix-only, port to win using %TEMP%
     Y_UNIT_TEST(TestInterrupt) {
-        TString tmpfile = TString("shellcommand_ut.interrupt.") + ToString(RandomNumber<ui32>()); 
+        TString tmpfile = TString("shellcommand_ut.interrupt.") + ToString(RandomNumber<ui32>());
 
         TShellCommandOptions options;
         options.SetAsync(true);
@@ -327,7 +327,7 @@ Y_UNIT_TEST_SUITE(TShellCommandTest) {
         rc = SigProcMask(SIG_SETMASK, &newmask, &oldmask);
         UNIT_ASSERT(rc == 0);
 
-        TString tmpfile = TString("shellcommand_ut.interrupt.") + ToString(RandomNumber<ui32>()); 
+        TString tmpfile = TString("shellcommand_ut.interrupt.") + ToString(RandomNumber<ui32>());
 
         TShellCommandOptions options;
         options.SetAsync(true);
@@ -381,7 +381,7 @@ Y_UNIT_TEST_SUITE(TShellCommandTest) {
     }
 #endif
     Y_UNIT_TEST(TestInternalError) {
-        TString input = (TString("a") * 2000).append("\n"); 
+        TString input = (TString("a") * 2000).append("\n");
         TStringInput inputStream(input);
         TMemoryOutput outputStream(nullptr, 0);
         TShellCommandOptions options;
diff --git a/util/system/spin_wait.cpp b/util/system/spin_wait.cpp
index c2281a111d..e27045e74f 100644
--- a/util/system/spin_wait.cpp
+++ b/util/system/spin_wait.cpp
@@ -8,7 +8,7 @@
 #include <util/generic/utility.h>
 
 template <class T>
-static inline T RandomizeSleepTime(T t) noexcept { 
+static inline T RandomizeSleepTime(T t) noexcept {
     static TAtomic counter = 0;
     const T rndNum = IntHash((T)AtomicIncrement(counter));
 
diff --git a/util/system/spinlock.h b/util/system/spinlock.h
index 85d8a281b8..af2630890a 100644
--- a/util/system/spinlock.h
+++ b/util/system/spinlock.h
@@ -14,7 +14,7 @@ public:
         return AtomicGet(Val_);
     }
 
-    inline bool TryAcquire() noexcept { 
+    inline bool TryAcquire() noexcept {
         return AtomicTryLock(&Val_);
     }
 
@@ -56,11 +56,11 @@ class TSpinLock: public TSpinLockBase {
 public:
     using TSpinLockBase::TSpinLockBase;
 
-    inline void Release() noexcept { 
+    inline void Release() noexcept {
         ReleaseSpinLock(&Val_);
     }
 
-    inline void Acquire() noexcept { 
+    inline void Acquire() noexcept {
         AcquireSpinLock(&Val_);
     }
 
@@ -91,11 +91,11 @@ class TAdaptiveLock: public TSpinLockBase {
 public:
     using TSpinLockBase::TSpinLockBase;
 
-    inline void Release() noexcept { 
+    inline void Release() noexcept {
         ReleaseAdaptiveLock(&Val_);
     }
 
-    inline void Acquire() noexcept { 
+    inline void Acquire() noexcept {
         AcquireAdaptiveLock(&Val_);
     }
 
@@ -112,15 +112,15 @@ public:
 
 template <>
 struct TCommonLockOps<TAtomic> {
-    static inline void Acquire(TAtomic* v) noexcept { 
+    static inline void Acquire(TAtomic* v) noexcept {
         AcquireAdaptiveLock(v);
     }
 
-    static inline bool TryAcquire(TAtomic* v) noexcept { 
+    static inline bool TryAcquire(TAtomic* v) noexcept {
         return AtomicTryLock(v);
     }
 
-    static inline void Release(TAtomic* v) noexcept { 
+    static inline void Release(TAtomic* v) noexcept {
         ReleaseAdaptiveLock(v);
     }
 };
diff --git a/util/system/src_location.cpp b/util/system/src_location.cpp
index 2d051f7be6..13ff1f24b3 100644
--- a/util/system/src_location.cpp
+++ b/util/system/src_location.cpp
@@ -7,7 +7,7 @@
 template <>
 void Out<TSourceLocation>(IOutputStream& o, const TSourceLocation& t) {
 #if defined(_win_)
-    TString file(t.File); 
+    TString file(t.File);
     std::replace(file.begin(), file.vend(), '\\', '/');
     o << file;
 #else
diff --git a/util/system/src_location_ut.cpp b/util/system/src_location_ut.cpp
index 6924ce35b1..5b86cb86ef 100644
--- a/util/system/src_location_ut.cpp
+++ b/util/system/src_location_ut.cpp
@@ -4,7 +4,7 @@
 
 #include <library/cpp/testing/unittest/registar.h>
 
-static inline TString GenLoc() { 
+static inline TString GenLoc() {
     return TStringBuilder() << __LOCATION__;
 }
 
diff --git a/util/system/src_root_ut.cpp b/util/system/src_root_ut.cpp
index 30f3520eda..e9a675eb9a 100644
--- a/util/system/src_root_ut.cpp
+++ b/util/system/src_root_ut.cpp
@@ -6,7 +6,7 @@
 Y_UNIT_TEST_SUITE(TestSourceRoot) {
     Y_UNIT_TEST(TestStrip) {
         // Reconstruct() converts "\" -> "/" on Windows
-        const TString path = TPathSplit(__SOURCE_FILE_IMPL__.As<TStringBuf>()).Reconstruct(); 
+        const TString path = TPathSplit(__SOURCE_FILE_IMPL__.As<TStringBuf>()).Reconstruct();
         UNIT_ASSERT_EQUAL(path, "util" LOCSLASH_S "system" LOCSLASH_S "src_root_ut.cpp");
     }
 
diff --git a/util/system/tempfile.cpp b/util/system/tempfile.cpp
index 0e3e461102..a2e9f49eb1 100644
--- a/util/system/tempfile.cpp
+++ b/util/system/tempfile.cpp
@@ -6,7 +6,7 @@ TTempFileHandle::TTempFileHandle()
 {
 }
 
-TTempFileHandle::TTempFileHandle(const TString& fname) 
+TTempFileHandle::TTempFileHandle(const TString& fname)
     : TTempFile(fname)
     , TFile(CreateFile())
 {
diff --git a/util/system/tempfile.h b/util/system/tempfile.h
index e20f792371..de249c129d 100644
--- a/util/system/tempfile.h
+++ b/util/system/tempfile.h
@@ -4,31 +4,31 @@
 #include "file.h"
 
 #include <util/folder/path.h>
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 
 class TTempFile {
 public:
-    inline TTempFile(const TString& fname) 
+    inline TTempFile(const TString& fname)
         : Name_(fname)
     {
     }
 
-    inline ~TTempFile() { 
+    inline ~TTempFile() {
         NFs::Remove(Name());
     }
 
-    inline const TString& Name() const noexcept { 
+    inline const TString& Name() const noexcept {
         return Name_;
     }
 
 private:
-    const TString Name_; 
+    const TString Name_;
 };
 
 class TTempFileHandle: public TTempFile, public TFile {
 public:
     TTempFileHandle();
-    TTempFileHandle(const TString& fname); 
+    TTempFileHandle(const TString& fname);
 
     static TTempFileHandle InCurrentDir(const TString& filePrefix = "yandex", const TString& extension = "tmp");
     static TTempFileHandle InDir(const TFsPath& dirPath, const TString& filePrefix = "yandex", const TString& extension = "tmp");
diff --git a/util/system/tempfile_ut.cpp b/util/system/tempfile_ut.cpp
index b5523fa788..e4a0923d0b 100644
--- a/util/system/tempfile_ut.cpp
+++ b/util/system/tempfile_ut.cpp
@@ -10,13 +10,13 @@
 
 Y_UNIT_TEST_SUITE(TTempFileHandle) {
     Y_UNIT_TEST(Create) {
-        TString path; 
+        TString path;
         {
             TTempFileHandle tmp;
             path = tmp.Name();
             tmp.Write("hello world\n", 12);
             tmp.FlushData();
-            UNIT_ASSERT_STRINGS_EQUAL(TUnbufferedFileInput(tmp.Name()).ReadAll(), "hello world\n"); 
+            UNIT_ASSERT_STRINGS_EQUAL(TUnbufferedFileInput(tmp.Name()).ReadAll(), "hello world\n");
         }
         UNIT_ASSERT(!NFs::Exists(path));
     }
diff --git a/util/system/thread.cpp b/util/system/thread.cpp
index e9cb938302..6236746c2d 100644
--- a/util/system/thread.cpp
+++ b/util/system/thread.cpp
@@ -51,7 +51,7 @@ namespace {
         }
     }
 
-    inline size_t StackSize(const TParams& p) noexcept { 
+    inline size_t StackSize(const TParams& p) noexcept {
         if (p.StackSize) {
             return FastClp2(p.StackSize);
         }
@@ -83,11 +83,11 @@ namespace {
         {
         }
 
-        inline bool Running() const noexcept { 
+        inline bool Running() const noexcept {
             return Handle != 0;
         }
 
-        inline TId SystemThreadId() const noexcept { 
+        inline TId SystemThreadId() const noexcept {
     #if _WIN32_WINNT < 0x0502
             return (TId)ThreadId;
     #else
@@ -168,7 +168,7 @@ namespace {
             static_assert(sizeof(H_) == sizeof(TId), "expect sizeof(H_) == sizeof(TId)");
         }
 
-        inline TId SystemThreadId() const noexcept { 
+        inline TId SystemThreadId() const noexcept {
             return (TId)H_;
         }
 
@@ -183,7 +183,7 @@ namespace {
             PCHECK(pthread_detach(H_), "can not detach thread");
         }
 
-        inline bool Running() const noexcept { 
+        inline bool Running() const noexcept {
             return (bool)H_;
         }
 
@@ -257,7 +257,7 @@ public:
     {
     }
 
-    inline TId Id() const noexcept { 
+    inline TId Id() const noexcept {
         return ThreadIdHashFunction(SystemThreadId());
     }
 
@@ -285,7 +285,7 @@ TThread::TThread(TPrivateCtor, THolder<TCallableBase> callable)
 {
 }
 
-TThread::~TThread() { 
+TThread::~TThread() {
     Join();
 }
 
@@ -312,11 +312,11 @@ void TThread::Detach() {
     }
 }
 
-bool TThread::Running() const noexcept { 
+bool TThread::Running() const noexcept {
     return Impl_ && Impl_->Running();
 }
 
-TThread::TId TThread::Id() const noexcept { 
+TThread::TId TThread::Id() const noexcept {
     if (Running()) {
         return Impl_->Id();
     }
@@ -324,7 +324,7 @@ TThread::TId TThread::Id() const noexcept {
     return ImpossibleThreadId();
 }
 
-TThread::TId TThread::CurrentThreadId() noexcept { 
+TThread::TId TThread::CurrentThreadId() noexcept {
     return SystemCurrentThreadId();
 }
 
@@ -352,7 +352,7 @@ TThread::TId TThread::CurrentThreadNumericId() noexcept {
 #endif
 }
 
-TThread::TId TThread::ImpossibleThreadId() noexcept { 
+TThread::TId TThread::ImpossibleThreadId() noexcept {
     return Max<TThread::TId>();
 }
 
diff --git a/util/system/thread.h b/util/system/thread.h
index 5702b549fa..a6e8abdb5b 100644
--- a/util/system/thread.h
+++ b/util/system/thread.h
@@ -5,7 +5,7 @@
 /// @see SystemThreadFactory()
 
 #include <util/generic/ptr.h>
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 
 #include "defaults.h"
 #include "progname.h"
@@ -53,19 +53,19 @@ public:
         {
         }
 
-        inline TParams& SetName(const TString& name) noexcept { 
+        inline TParams& SetName(const TString& name) noexcept {
             Name = name;
 
             return *this;
         }
 
-        inline TParams& SetStackSize(size_t size) noexcept { 
+        inline TParams& SetStackSize(size_t size) noexcept {
             StackSize = size;
 
             return *this;
         }
 
-        inline TParams& SetStackPointer(void* ptr) noexcept { 
+        inline TParams& SetStackPointer(void* ptr) noexcept {
             StackPointer = ptr;
 
             return *this;
@@ -92,17 +92,17 @@ public:
     {
     }
 
-    ~TThread(); 
+    ~TThread();
 
     void Start();
 
     void* Join();
     void Detach();
-    bool Running() const noexcept; 
-    TId Id() const noexcept; 
+    bool Running() const noexcept;
+    TId Id() const noexcept;
 
-    static TId ImpossibleThreadId() noexcept; 
-    static TId CurrentThreadId() noexcept; 
+    static TId ImpossibleThreadId() noexcept;
+    static TId CurrentThreadId() noexcept;
 
     /*
      * Returns numeric thread id, as visible in e. g. htop.
diff --git a/util/system/thread.i b/util/system/thread.i
index 086befc238..8cba505473 100644
--- a/util/system/thread.i
+++ b/util/system/thread.i
@@ -24,7 +24,7 @@
 
 #include <util/digest/numeric.h>
 
-static inline size_t SystemCurrentThreadIdImpl() noexcept { 
+static inline size_t SystemCurrentThreadIdImpl() noexcept {
     #if defined(_unix_)
         return (size_t)pthread_self();
     #elif defined(_win_)
@@ -35,7 +35,7 @@ static inline size_t SystemCurrentThreadIdImpl() noexcept {
 }
 
 template <class T>
-static inline T ThreadIdHashFunction(T t) noexcept { 
+static inline T ThreadIdHashFunction(T t) noexcept {
     /*
      * we must permute threadid bits, because some strange platforms(such Linux)
      * have strange threadid numeric properties
@@ -47,6 +47,6 @@ static inline T ThreadIdHashFunction(T t) noexcept {
     return IntHash(t);
 }
 
-static inline size_t SystemCurrentThreadId() noexcept { 
+static inline size_t SystemCurrentThreadId() noexcept {
     return ThreadIdHashFunction(SystemCurrentThreadIdImpl());
 }
diff --git a/util/system/tls.cpp b/util/system/tls.cpp
index 9fdafc5b54..c2f1a04a14 100644
--- a/util/system/tls.cpp
+++ b/util/system/tls.cpp
@@ -6,7 +6,7 @@
 #include <util/generic/hash.h>
 #include <util/generic/intrlist.h>
 #include <util/generic/singleton.h>
-#include <util/generic/vector.h> 
+#include <util/generic/vector.h>
 
 #if defined(_unix_)
     #include <pthread.h>
@@ -46,17 +46,17 @@ namespace {
                 {
                 }
 
-                inline ~TStoredValue() { 
+                inline ~TStoredValue() {
                     if (Dtor_ && Data_) {
                         Dtor_(Data_);
                     }
                 }
 
-                inline void Set(void* ptr) noexcept { 
+                inline void Set(void* ptr) noexcept {
                     Data_ = ptr;
                 }
 
-                inline void* Get() const noexcept { 
+                inline void* Get() const noexcept {
                     return Data_;
                 }
 
@@ -92,8 +92,8 @@ namespace {
             }
 
         private:
-            TVector<TStoredValue*> Values_; 
-            THashMap<size_t, TStoredValue*> FarValues_; 
+            TVector<TStoredValue*> Values_;
+            THashMap<size_t, TStoredValue*> FarValues_;
             TIntrusiveListWithAutoDelete<TStoredValue, TDelete> Storage_;
         };
 
@@ -126,7 +126,7 @@ namespace {
             Y_VERIFY(!pthread_key_create(&Key_, Dtor), "pthread_key_create failed");
         }
 
-        inline ~TMasterTls() override { 
+        inline ~TMasterTls() override {
             //explicitly call dtor for main thread
             Dtor(pthread_getspecific(Key_));
 
@@ -197,7 +197,7 @@ namespace {
             }
         }
 
-        inline void Cleanup() noexcept { 
+        inline void Cleanup() noexcept {
             with_lock (Lock_) {
                 Datas_.erase(TThread::CurrentThreadId());
             }
@@ -210,7 +210,7 @@ namespace {
     private:
         using TPTSRef = THolder<TPerThreadStorage>;
         TMutex Lock_;
-        THashMap<TThread::TId, TPTSRef> Datas_; 
+        THashMap<TThread::TId, TPTSRef> Datas_;
     };
 }
 
@@ -255,6 +255,6 @@ void TKey::Set(void* ptr) const {
     Impl_->Set(ptr);
 }
 
-void TKey::Cleanup() noexcept { 
+void TKey::Cleanup() noexcept {
     TImpl::Cleanup();
 }
diff --git a/util/system/tls.h b/util/system/tls.h
index 29b5e1994b..3c4f56dbeb 100644
--- a/util/system/tls.h
+++ b/util/system/tls.h
@@ -158,12 +158,12 @@ namespace NTls {
     public:
         TKey(TDtor dtor);
         TKey(TKey&&) noexcept;
-        ~TKey(); 
+        ~TKey();
 
         void* Get() const;
         void Set(void* ptr) const;
 
-        static void Cleanup() noexcept; 
+        static void Cleanup() noexcept;
 
     private:
         class TImpl;
@@ -171,7 +171,7 @@ namespace NTls {
     };
 
     struct TCleaner {
-        inline ~TCleaner() { 
+        inline ~TCleaner() {
             TKey::Cleanup();
         }
     };
@@ -292,16 +292,16 @@ namespace NTls {
 }
 
 template <class T>
-static inline T& TlsRef(NTls::TValue<T>& v) noexcept { 
+static inline T& TlsRef(NTls::TValue<T>& v) noexcept {
     return v;
 }
 
 template <class T>
-static inline const T& TlsRef(const NTls::TValue<T>& v) noexcept { 
+static inline const T& TlsRef(const NTls::TValue<T>& v) noexcept {
     return v;
 }
 
 template <class T>
-static inline T& TlsRef(T& v) noexcept { 
+static inline T& TlsRef(T& v) noexcept {
     return v;
 }
diff --git a/util/system/tls_ut.cpp b/util/system/tls_ut.cpp
index ad3db72a12..e84d34b42a 100644
--- a/util/system/tls_ut.cpp
+++ b/util/system/tls_ut.cpp
@@ -31,7 +31,7 @@ Y_UNIT_TEST_SUITE(TTestTLS) {
             {
             }
 
-            void* ThreadProc() noexcept override { 
+            void* ThreadProc() noexcept override {
                 for (size_t i = 0; i < 100000; ++i) {
                     P[i].Do();
                 }
diff --git a/util/system/type_name.h b/util/system/type_name.h
index 76997db26f..b6619aba3f 100644
--- a/util/system/type_name.h
+++ b/util/system/type_name.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 #include <util/string/subst.h>
 
 #include <typeindex>
diff --git a/util/system/user.cpp b/util/system/user.cpp
index ac6772f458..83e89ea0a8 100644
--- a/util/system/user.cpp
+++ b/util/system/user.cpp
@@ -13,7 +13,7 @@
     #include <unistd.h>
 #endif
 
-TString GetUsername() { 
+TString GetUsername() {
     for (const auto& var : {"LOGNAME", "USER", "LNAME", "USERNAME"}) {
         TString val = GetEnv(var);
         if (val) {
@@ -32,13 +32,13 @@ TString GetUsername() {
             else
                 ythrow TSystemError(err) << " GetUserName failed";
         } else {
-            return TString(nameBuf.Data(), (size_t)(len - 1)); 
+            return TString(nameBuf.Data(), (size_t)(len - 1));
         }
 #elif defined(_bionic_)
         const passwd* pwd = getpwuid(geteuid());
 
         if (pwd) {
-            return TString(pwd->pw_name); 
+            return TString(pwd->pw_name);
         }
 
         ythrow TSystemError() << TStringBuf(" getpwuid failed");
diff --git a/util/system/user.h b/util/system/user.h
index 6d02d7ca48..be348d1cee 100644
--- a/util/system/user.h
+++ b/util/system/user.h
@@ -2,4 +2,4 @@
 
 #include <util/generic/fwd.h>
 
-TString GetUsername(); 
+TString GetUsername();
diff --git a/util/system/ut/ya.make b/util/system/ut/ya.make
index dc64badf1b..127e7c261e 100644
--- a/util/system/ut/ya.make
+++ b/util/system/ut/ya.make
@@ -30,7 +30,7 @@ SRCS(
     system/backtrace_ut.cpp
     system/byteorder_ut.cpp
     system/compat_ut.cpp
-    system/compiler_ut.cpp 
+    system/compiler_ut.cpp
     system/context_ut.cpp
     system/condvar_ut.cpp
     system/cpu_id_ut.cpp
@@ -66,7 +66,7 @@ SRCS(
     system/spinlock_ut.cpp
     system/src_root_ut.cpp
     system/src_location_ut.cpp
-    system/shmat_ut.cpp 
+    system/shmat_ut.cpp
     system/tempfile_ut.cpp
     system/thread_ut.cpp
     system/tls_ut.cpp
diff --git a/util/system/yassert.cpp b/util/system/yassert.cpp
index cb006eec70..0f586648b7 100644
--- a/util/system/yassert.cpp
+++ b/util/system/yassert.cpp
@@ -8,7 +8,7 @@
 #include <util/datetime/base.h>
 #include <util/generic/singleton.h>
 #include <util/generic/strbuf.h>
-#include <util/generic/string.h> 
+#include <util/generic/string.h>
 #include <util/stream/output.h>
 #include <util/stream/str.h>
 #include <util/string/printf.h>
@@ -38,13 +38,13 @@ namespace NPrivate {
     [[noreturn]] Y_NO_INLINE void InternalPanicImpl(int line, const char* function, const char* expr, int, int, int, const TStringBuf file, const char* errorMessage, size_t errorMessageSize) noexcept;
 }
 
-void ::NPrivate::Panic(const TStaticBuf& file, int line, const char* function, const char* expr, const char* format, ...) noexcept { 
+void ::NPrivate::Panic(const TStaticBuf& file, int line, const char* function, const char* expr, const char* format, ...) noexcept {
     try {
         // We care of panic of first failed thread only
         // Otherwise stderr could contain multiple messages and stack traces shuffled
         auto guard = Guard(*Singleton<TPanicLockHolder>());
 
-        TString errorMsg; 
+        TString errorMsg;
         va_list args;
         va_start(args, format);
         // format has " " prefix to mute GCC warning on empty format
@@ -65,7 +65,7 @@ namespace NPrivate {
         TStringBuf errorMsg{errorMessage, errorMessageSize};
         const TString now = TInstant::Now().ToStringLocal();
 
-        TString r; 
+        TString r;
         TStringOutput o(r);
         if (expr) {
             o << "VERIFY failed (" << now << "): " << errorMsg << Endl;
diff --git a/util/system/yield.cpp b/util/system/yield.cpp
index 0da3c2f573..b327b37b1a 100644
--- a/util/system/yield.cpp
+++ b/util/system/yield.cpp
@@ -8,7 +8,7 @@
     #include <sched.h>
 #endif
 
-void SchedYield() noexcept { 
+void SchedYield() noexcept {
 #if defined(_unix_)
     sched_yield();
 #else
@@ -16,7 +16,7 @@ void SchedYield() noexcept {
 #endif
 }
 
-void ThreadYield() noexcept { 
+void ThreadYield() noexcept {
 #if defined(_freebsd_)
     pthread_yield();
 #else
diff --git a/util/system/yield.h b/util/system/yield.h
index 7886ac0522..9965fb52b5 100644
--- a/util/system/yield.h
+++ b/util/system/yield.h
@@ -1,4 +1,4 @@
 #pragma once
 
-void SchedYield() noexcept; 
-void ThreadYield() noexcept; 
+void SchedYield() noexcept;
+void ThreadYield() noexcept;