Restoring authorship annotation for <myltsev@yandex-team.ru>. Commit 2 of 2.

46 files changed, 957 insertions, 957 deletions

diff --git a/library/cpp/containers/comptrie/comptrie_builder.h b/library/cpp/containers/comptrie/comptrie_builder.h
index 39a394f6ef..cf7d2e39a3 100644
--- a/library/cpp/containers/comptrie/comptrie_builder.h
+++ b/library/cpp/containers/comptrie/comptrie_builder.h
@@ -115,7 +115,7 @@ protected:
 // IMPORTANT: never try to reminimize an already minimized trie or a trie with fast layout.
 // Because of non-local structure and epsilon links, it won't work
 // as you expect it to, and can destroy the trie in the making.
-// If you want both minimization and fast layout, do the minimization first. 
+// If you want both minimization and fast layout, do the minimization first.
 
 template <class TPacker>
 size_t CompactTrieMinimize(IOutputStream& os, const char* data, size_t datalength, bool verbose = false, const TPacker& packer = TPacker(), NCompactTrie::EMinimizeMode mode = NCompactTrie::MM_DEFAULT);
diff --git a/library/cpp/getopt/small/last_getopt_opt.h b/library/cpp/getopt/small/last_getopt_opt.h
index f1ed8c7017..a8dd5adca9 100644
--- a/library/cpp/getopt/small/last_getopt_opt.h
+++ b/library/cpp/getopt/small/last_getopt_opt.h
@@ -637,11 +637,11 @@ namespace NLastGetopt {
             return DefaultValue("0").StoreResult(target, true);
         }
 
-        // Similar to store_true in Python's argparse 
-        TOpt& StoreTrue(bool* target) { 
-            return NoArgument().SetFlag(target); 
-        } 
- 
+        // Similar to store_true in Python's argparse
+        TOpt& StoreTrue(bool* target) {
+            return NoArgument().SetFlag(target);
+        }
+
         template <typename TpVal, typename T, typename TpFunc>
         TOpt& StoreMappedResultT(T* target, const TpFunc& func) {
             return Handler1T<TpVal>(NPrivate::TStoreMappedResultFunctor<T, TpFunc, TpVal>(target, func));
@@ -675,13 +675,13 @@ namespace NLastGetopt {
         // Appends FromString<T>(arg) to *target for each argument
         template <typename T>
         TOpt& AppendTo(TVector<T>* target) {
-            return Handler1T<T>([target](auto&& value) { target->push_back(std::move(value)); }); 
+            return Handler1T<T>([target](auto&& value) { target->push_back(std::move(value)); });
         }
 
         // Appends FromString<T>(arg) to *target for each argument
         template <typename T>
         TOpt& InsertTo(THashSet<T>* target) {
-            return Handler1T<T>([target](auto&& value) { target->insert(std::move(value)); }); 
+            return Handler1T<T>([target](auto&& value) { target->insert(std::move(value)); });
         }
 
         // Emplaces TString arg to *target for each argument
diff --git a/library/cpp/getopt/ut/last_getopt_ut.cpp b/library/cpp/getopt/ut/last_getopt_ut.cpp
index cec948ecac..c99a1d053d 100644
--- a/library/cpp/getopt/ut/last_getopt_ut.cpp
+++ b/library/cpp/getopt/ut/last_getopt_ut.cpp
@@ -455,20 +455,20 @@ Y_UNIT_TEST_SUITE(TLastGetoptTests) {
     }
 
     Y_UNIT_TEST(TestSetFlag) {
-        bool a = false, b = true, c = false, d = true; 
+        bool a = false, b = true, c = false, d = true;
 
         TOptsNoDefault opts;
         opts.AddLongOption('a', "alpha").NoArgument().SetFlag(&a);
         opts.AddLongOption('b', "beta").NoArgument().SetFlag(&b);
-        opts.AddCharOption('c').StoreTrue(&c); 
-        opts.AddCharOption('d').StoreTrue(&d); 
+        opts.AddCharOption('c').StoreTrue(&c);
+        opts.AddCharOption('d').StoreTrue(&d);
 
-        TOptsParseResultTestWrapper r(&opts, V({"cmd", "-a", "-c"})); 
+        TOptsParseResultTestWrapper r(&opts, V({"cmd", "-a", "-c"}));
 
         UNIT_ASSERT(a);
         UNIT_ASSERT(!b);
-        UNIT_ASSERT(c); 
-        UNIT_ASSERT(!d); 
+        UNIT_ASSERT(c);
+        UNIT_ASSERT(!d);
     }
 
     Y_UNIT_TEST(TestDefaultValue) {
diff --git a/library/cpp/http/io/headers.cpp b/library/cpp/http/io/headers.cpp
index fe82383318..4ec27a29e8 100644
--- a/library/cpp/http/io/headers.cpp
+++ b/library/cpp/http/io/headers.cpp
@@ -75,12 +75,12 @@ const THttpInputHeader* THttpHeaders::FindHeader(const TStringBuf header) const
 void THttpHeaders::RemoveHeader(const TStringBuf header) {
     for (auto h = Headers_.begin(); h != Headers_.end(); ++h) {
         if (AsciiCompareIgnoreCase(h->Name(), header) == 0) {
-            Headers_.erase(h); 
-            return; 
-        } 
-    } 
-} 
- 
+            Headers_.erase(h);
+            return;
+        }
+    }
+}
+
 void THttpHeaders::AddOrReplaceHeader(const THttpInputHeader& header) {
     for (auto& hdr : Headers_) {
         if (AsciiCompareIgnoreCase(hdr.Name(), header.Name()) == 0) {
diff --git a/library/cpp/http/io/headers.h b/library/cpp/http/io/headers.h
index 3b15d60462..a71793d1c6 100644
--- a/library/cpp/http/io/headers.h
+++ b/library/cpp/http/io/headers.h
@@ -102,9 +102,9 @@ public:
     // Проверяет, есть ли такой заголовок
     bool HasHeader(TStringBuf header) const;
 
-    /// Удаляет заголовок, если он есть. 
+    /// Удаляет заголовок, если он есть.
     void RemoveHeader(TStringBuf header);
- 
+
     /// Ищет заголовок по указанному имени
     /// Возвращает nullptr, если не нашел
     const THttpInputHeader* FindHeader(TStringBuf header) const;
diff --git a/library/cpp/http/io/stream.cpp b/library/cpp/http/io/stream.cpp
index 90d063a4ba..6689be684f 100644
--- a/library/cpp/http/io/stream.cpp
+++ b/library/cpp/http/io/stream.cpp
@@ -776,7 +776,7 @@ private:
                 TString scheme = Request_->BestCompressionScheme(ComprSchemas_);
                 if (scheme != "identity") {
                     AddOrReplaceHeader(THttpInputHeader("Content-Encoding", scheme));
-                    RemoveHeader("Content-Length"); 
+                    RemoveHeader("Content-Length");
                 }
             }
 
@@ -851,9 +851,9 @@ private:
     }
 
     inline void RemoveHeader(const TString& hdr) {
-        Headers_.RemoveHeader(hdr); 
-    } 
- 
+        Headers_.RemoveHeader(hdr);
+    }
+
 private:
     IOutputStream* Slave_;
     TState State_;
diff --git a/library/cpp/http/io/stream_ut.cpp b/library/cpp/http/io/stream_ut.cpp
index 64b48b4a66..1ea35df675 100644
--- a/library/cpp/http/io/stream_ut.cpp
+++ b/library/cpp/http/io/stream_ut.cpp
@@ -420,27 +420,27 @@ Y_UNIT_TEST_SUITE(THttpStreamTest) {
     }
 
     Y_UNIT_TEST(ContentLengthRemoval) {
-        TMemoryInput request("GET / HTTP/1.1\r\nAccept-Encoding: gzip\r\n\r\n"); 
-        THttpInput i(&request); 
+        TMemoryInput request("GET / HTTP/1.1\r\nAccept-Encoding: gzip\r\n\r\n");
+        THttpInput i(&request);
         TString result;
-        TStringOutput out(result); 
-        THttpOutput httpOut(&out, &i); 
- 
-        httpOut.EnableKeepAlive(true); 
-        httpOut.EnableCompression(true); 
-        httpOut << "HTTP/1.1 200 OK\r\n"; 
-        char answer[] = "Mary had a little lamb."; 
+        TStringOutput out(result);
+        THttpOutput httpOut(&out, &i);
+
+        httpOut.EnableKeepAlive(true);
+        httpOut.EnableCompression(true);
+        httpOut << "HTTP/1.1 200 OK\r\n";
+        char answer[] = "Mary had a little lamb.";
         httpOut << "Content-Length: " << strlen(answer) << "\r\n"
                                                            "\r\n";
-        httpOut << answer; 
-        httpOut.Finish(); 
- 
-        Cdbg << result; 
-        result.to_lower(); 
-        UNIT_ASSERT(result.Contains("content-encoding: gzip")); 
-        UNIT_ASSERT(!result.Contains("content-length")); 
-    } 
- 
+        httpOut << answer;
+        httpOut.Finish();
+
+        Cdbg << result;
+        result.to_lower();
+        UNIT_ASSERT(result.Contains("content-encoding: gzip"));
+        UNIT_ASSERT(!result.Contains("content-length"));
+    }
+
     Y_UNIT_TEST(CodecsPriority) {
         TMemoryInput request("GET / HTTP/1.1\r\nAccept-Encoding: gzip, br\r\n\r\n");
         TVector<TStringBuf> codecs = {"br", "gzip"};
diff --git a/library/cpp/http/misc/httpdate.cpp b/library/cpp/http/misc/httpdate.cpp
index 1d6617eeec..4a3031bbf4 100644
--- a/library/cpp/http/misc/httpdate.cpp
+++ b/library/cpp/http/misc/httpdate.cpp
@@ -75,9 +75,9 @@ char* format_http_date(time_t when, char* buf, size_t buflen) {
 
     return buf;
 }
- 
+
 TString FormatHttpDate(time_t when) {
-    char str[64] = {0}; 
+    char str[64] = {0};
     format_http_date(str, Y_ARRAY_SIZE(str), when);
     return TString(str);
-} 
+}
diff --git a/library/cpp/http/misc/httpdate.h b/library/cpp/http/misc/httpdate.h
index 2a33545a7e..04876f38fe 100644
--- a/library/cpp/http/misc/httpdate.h
+++ b/library/cpp/http/misc/httpdate.h
@@ -17,5 +17,5 @@ inline time_t parse_http_date(const TStringBuf& datestring) {
 
 int format_http_date(char buf[], size_t size, time_t when);
 char* format_http_date(time_t when, char* buf, size_t len);
- 
+
 TString FormatHttpDate(time_t when);
diff --git a/library/cpp/http/misc/httpdate_ut.cpp b/library/cpp/http/misc/httpdate_ut.cpp
index 8d700a9593..c1a0103501 100644
--- a/library/cpp/http/misc/httpdate_ut.cpp
+++ b/library/cpp/http/misc/httpdate_ut.cpp
@@ -10,6 +10,6 @@ Y_UNIT_TEST_SUITE(TestHttpDate) {
         UNIT_ASSERT((int)strlen(format_http_date(0, buf1, sizeof(buf1))) == format_http_date(buf2, sizeof(buf2), 0));
     }
     Y_UNIT_TEST(Test2) {
-        UNIT_ASSERT_STRINGS_EQUAL(FormatHttpDate(1234567890), "Fri, 13 Feb 2009 23:31:30 GMT"); 
-    } 
+        UNIT_ASSERT_STRINGS_EQUAL(FormatHttpDate(1234567890), "Fri, 13 Feb 2009 23:31:30 GMT");
+    }
 }
diff --git a/library/cpp/http/server/response.h b/library/cpp/http/server/response.h
index 05a4d53caa..a75cb85605 100644
--- a/library/cpp/http/server/response.h
+++ b/library/cpp/http/server/response.h
@@ -51,10 +51,10 @@ public:
         return *this;
     }
 
-    TString GetContent() const { 
-        return Content; 
-    } 
- 
+    TString GetContent() const {
+        return Content;
+    }
+
     /**
      * @note If @arg content isn't empty its size is automatically added as a
      * "Content-Length" header during output to IOutputStream.
diff --git a/library/cpp/json/easy_parse/json_easy_parser_impl.h b/library/cpp/json/easy_parse/json_easy_parser_impl.h
index 9f9486c6f5..ec55d838b3 100644
--- a/library/cpp/json/easy_parse/json_easy_parser_impl.h
+++ b/library/cpp/json/easy_parse/json_easy_parser_impl.h
@@ -3,34 +3,34 @@
 #include <util/generic/string.h>
 
 namespace NJson {
-    namespace NImpl { 
+    namespace NImpl {
         enum EType {
             ARRAY,
             MAP,
             MAP_KEY
         };
-    } 
+    }
     template <class TStringType>
-    struct TPathElemImpl { 
-        NImpl::EType Type; 
+    struct TPathElemImpl {
+        NImpl::EType Type;
         TStringType Key;
         int ArrayCounter;
 
-        TPathElemImpl(NImpl::EType type) 
+        TPathElemImpl(NImpl::EType type)
             : Type(type)
             , ArrayCounter()
         {
         }
 
         TPathElemImpl(const TStringType& key)
-            : Type(NImpl::MAP_KEY) 
+            : Type(NImpl::MAP_KEY)
             , Key(key)
             , ArrayCounter()
         {
         }
 
         TPathElemImpl(int arrayCounter)
-            : Type(NImpl::ARRAY) 
+            : Type(NImpl::ARRAY)
             , ArrayCounter(arrayCounter)
         {
         }
diff --git a/library/cpp/json/json_value.h b/library/cpp/json/json_value.h
index 9109377521..f70f4d2ee8 100644
--- a/library/cpp/json/json_value.h
+++ b/library/cpp/json/json_value.h
@@ -1,3 +1,3 @@
-#pragma once 
- 
+#pragma once
+
 #include <library/cpp/json/writer/json_value.h>
diff --git a/library/cpp/json/json_writer.cpp b/library/cpp/json/json_writer.cpp
index c9fc529135..3d058bae36 100644
--- a/library/cpp/json/json_writer.cpp
+++ b/library/cpp/json/json_writer.cpp
@@ -73,14 +73,14 @@ namespace NJson {
             throw yexception() << "JSON writer: invalid UTF-8";
         if (Buf.KeyExpected()) {
             Buf.WriteKey(value);
-        } else { 
+        } else {
             if (DontEscapeStrings) {
                 Buf.UnsafeWriteValue(TString("\"") + value + '"');
             } else {
                 Buf.WriteString(value);
             }
-        } 
-    } 
+        }
+    }
 
     void TJsonWriter::WriteNull() {
         Buf.WriteNull();
diff --git a/library/cpp/json/json_writer.h b/library/cpp/json/json_writer.h
index 471ff3ed71..c7f5c9499a 100644
--- a/library/cpp/json/json_writer.h
+++ b/library/cpp/json/json_writer.h
@@ -1,7 +1,7 @@
 #pragma once
 
 // Deprecated. Use library/cpp/json/writer in new code.
- 
+
 #include "json_value.h"
 
 #include <library/cpp/json/writer/json.h>
diff --git a/library/cpp/json/ut/json_writer_ut.cpp b/library/cpp/json/ut/json_writer_ut.cpp
index f4d9cde0e8..ca11d34dad 100644
--- a/library/cpp/json/ut/json_writer_ut.cpp
+++ b/library/cpp/json/ut/json_writer_ut.cpp
@@ -71,17 +71,17 @@ Y_UNIT_TEST_SUITE(TJsonWriterTest) {
 
     Y_UNIT_TEST(SortKeys) {
         TString expected = "{\"a\":null,\"j\":null,\"n\":null,\"y\":null,\"z\":null}";
-        TJsonValue v; 
-        v["z"] = JSON_NULL; 
-        v["n"] = JSON_NULL; 
-        v["a"] = JSON_NULL; 
-        v["y"] = JSON_NULL; 
-        v["j"] = JSON_NULL; 
-        TStringStream out; 
-        WriteJson(&out, &v, false, true); 
-        UNIT_ASSERT_STRINGS_EQUAL(out.Str(), expected); 
-    } 
- 
+        TJsonValue v;
+        v["z"] = JSON_NULL;
+        v["n"] = JSON_NULL;
+        v["a"] = JSON_NULL;
+        v["y"] = JSON_NULL;
+        v["j"] = JSON_NULL;
+        TStringStream out;
+        WriteJson(&out, &v, false, true);
+        UNIT_ASSERT_STRINGS_EQUAL(out.Str(), expected);
+    }
+
     Y_UNIT_TEST(SimpleUnsignedIntegerWriteTest) {
         {
             TString expected = "{\"test\":1}";
diff --git a/library/cpp/json/writer/README b/library/cpp/json/writer/README
index 6e6f754658..a20489f32e 100644
--- a/library/cpp/json/writer/README
+++ b/library/cpp/json/writer/README
@@ -1,23 +1,23 @@
-JSON writer with no external dependencies, producing output 
-where HTML special characters are always escaped. 
- 
-Use it like this: 
- 
+JSON writer with no external dependencies, producing output
+where HTML special characters are always escaped.
+
+Use it like this:
+
     #include <library/cpp/json/writer/json.h>
-    ... 
- 
-    NJsonWriter::TBuf json; 
-    json.BeginList() 
-        .WriteString("<script>") 
-        .EndList(); 
-    Cout << json.Str(); // output: ["\u003Cscript\u003E"] 
- 
-For compatibility with legacy formats where object keys 
-are not quoted, use CompatWriteKeyWithoutQuotes: 
-     
-    NJsonWriter::TBuf json; 
-    json.BeginObject() 
-        .CompatWriteKeyWithoutQuotes("r").WriteInt(1) 
-        .CompatWriteKeyWithoutQuotes("n").WriteInt(0) 
-    .EndObject(); 
-    Cout << json.Str(); // output: {r:1,n:0} 
+    ...
+
+    NJsonWriter::TBuf json;
+    json.BeginList()
+        .WriteString("<script>")
+        .EndList();
+    Cout << json.Str(); // output: ["\u003Cscript\u003E"]
+
+For compatibility with legacy formats where object keys
+are not quoted, use CompatWriteKeyWithoutQuotes:
+    
+    NJsonWriter::TBuf json;
+    json.BeginObject()
+        .CompatWriteKeyWithoutQuotes("r").WriteInt(1)
+        .CompatWriteKeyWithoutQuotes("n").WriteInt(0)
+    .EndObject();
+    Cout << json.Str(); // output: {r:1,n:0}
diff --git a/library/cpp/json/writer/json.cpp b/library/cpp/json/writer/json.cpp
index 50523bf754..02370c2d79 100644
--- a/library/cpp/json/writer/json.cpp
+++ b/library/cpp/json/writer/json.cpp
@@ -1,14 +1,14 @@
-#include "json.h" 
+#include "json.h"
 
 #include <library/cpp/json/json_value.h>
 
 #include <util/string/cast.h>
 #include <util/string/strspn.h>
-#include <util/generic/algorithm.h> 
-#include <util/generic/ymath.h> 
+#include <util/generic/algorithm.h>
+#include <util/generic/ymath.h>
 #include <util/generic/singleton.h>
- 
-namespace NJsonWriter { 
+
+namespace NJsonWriter {
     TBuf::TBuf(EHtmlEscapeMode mode, IOutputStream* stream)
         : Stream(stream)
         , NeedComma(false)
@@ -25,7 +25,7 @@ namespace NJsonWriter {
             StringStream.Reset(new TStringStream);
             Stream = StringStream.Get();
         }
- 
+
         Stack.reserve(64); // should be enough for most cases
         StackPush(JE_OUTER_SPACE);
     }
@@ -47,12 +47,12 @@ namespace NJsonWriter {
 
     inline void TBuf::StackPush(EJsonEntity e) {
         Stack.push_back(e);
-    } 
- 
+    }
+
     inline EJsonEntity TBuf::StackTop() const {
         return Stack.back();
     }
- 
+
     inline void TBuf::StackPop() {
         Y_ASSERT(!Stack.empty());
         const EJsonEntity current = StackTop();
@@ -81,8 +81,8 @@ namespace NJsonWriter {
                             << EntityToStr(StackTop()) << " on the stack";
         }
         StackPop();
-    } 
- 
+    }
+
     void TBuf::PrintIndentation(bool closing) {
         if (!IndentSpaces)
             return;
@@ -126,7 +126,7 @@ namespace NJsonWriter {
         }
         WriteComma();
     }
- 
+
     inline void TBuf::BeginKey() {
         if (Y_UNLIKELY(!KeyExpected())) {
             ythrow TError() << "JSON writer: key written outside of an object";
@@ -135,14 +135,14 @@ namespace NJsonWriter {
         StackPush(JE_PAIR);
         NeedComma = false;
         NeedNewline = false;
-    } 
+    }
 
     inline void TBuf::EndValue() {
         if (StackTop() == JE_PAIR) {
             StackPop();
         }
     }
- 
+
     TValueContext TBuf::BeginList() {
         NeedNewline = true;
         BeginValue();
@@ -150,8 +150,8 @@ namespace NJsonWriter {
         StackPush(JE_LIST);
         NeedComma = false;
         return TValueContext(*this);
-    } 
- 
+    }
+
     TPairContext TBuf::BeginObject() {
         NeedNewline = true;
         BeginValue();
@@ -159,28 +159,28 @@ namespace NJsonWriter {
         StackPush(JE_OBJECT);
         NeedComma = false;
         return TPairContext(*this);
-    } 
- 
+    }
+
     TAfterColonContext TBuf::UnsafeWriteKey(const TStringBuf& s) {
         BeginKey();
         RawWriteChar('"');
         UnsafeWriteRawBytes(s);
         UnsafeWriteRawBytes("\":", 2);
         return TAfterColonContext(*this);
-    } 
- 
+    }
+
     TAfterColonContext TBuf::WriteKey(const TStringBuf& s) {
         // use the default escaping mode for this object
         return WriteKey(s, EscapeMode);
     }
- 
+
     TAfterColonContext TBuf::WriteKey(const TStringBuf& s, EHtmlEscapeMode hem) {
         BeginKey();
         WriteBareString(s, hem);
         RawWriteChar(':');
         return TAfterColonContext(*this);
     }
- 
+
     TAfterColonContext TBuf::CompatWriteKeyWithoutQuotes(const TStringBuf& s) {
         BeginKey();
         Y_ASSERT(AllOf(s, [](char x) { return 'a' <= x && x <= 'z'; }));
@@ -194,44 +194,44 @@ namespace NJsonWriter {
         EndValue();
         return *this;
     }
- 
+
     TBuf& TBuf::EndObject() {
         CheckAndPop(JE_OBJECT);
         EndValue();
         return *this;
     }
- 
+
     TValueContext TBuf::WriteString(const TStringBuf& s) {
         // use the default escaping mode for this object
         return WriteString(s, EscapeMode);
     }
- 
+
     TValueContext TBuf::WriteString(const TStringBuf& s, EHtmlEscapeMode hem) {
         BeginValue();
         WriteBareString(s, hem);
         EndValue();
         return TValueContext(*this);
     }
- 
+
     TValueContext TBuf::WriteNull() {
         UnsafeWriteValue(TStringBuf("null"));
         return TValueContext(*this);
     }
- 
+
     TValueContext TBuf::WriteBool(bool b) {
         constexpr TStringBuf trueVal = "true";
         constexpr TStringBuf falseVal = "false";
         UnsafeWriteValue(b ? trueVal : falseVal);
         return TValueContext(*this);
     }
- 
+
     TValueContext TBuf::WriteInt(int i) {
         char buf[22]; // enough to hold any 64-bit number
         size_t len = ToString(i, buf, sizeof(buf));
         UnsafeWriteValue(buf, len);
         return TValueContext(*this);
     }
- 
+
     TValueContext TBuf::WriteLongLong(long long i) {
         static_assert(sizeof(long long) <= 8, "expect sizeof(long long) <= 8");
         char buf[22]; // enough to hold any 64-bit number
@@ -239,14 +239,14 @@ namespace NJsonWriter {
         UnsafeWriteValue(buf, len);
         return TValueContext(*this);
     }
- 
+
     TValueContext TBuf::WriteULongLong(unsigned long long i) {
         char buf[22]; // enough to hold any 64-bit number
         size_t len = ToString(i, buf, sizeof(buf));
         UnsafeWriteValue(buf, len);
         return TValueContext(*this);
     }
- 
+
     template <class TFloat>
     TValueContext TBuf::WriteFloatImpl(TFloat f, EFloatToStringMode mode, int ndigits) {
         char buf[512]; // enough to hold most floats, the same buffer is used in FloatToString implementation
@@ -271,7 +271,7 @@ namespace NJsonWriter {
     TValueContext TBuf::WriteDouble(double f, EFloatToStringMode mode, int ndigits) {
         return WriteFloatImpl(f, mode, ndigits);
     }
- 
+
     namespace {
         struct TFinder: public TCompactStrSpn {
             inline TFinder()
@@ -306,12 +306,12 @@ namespace NJsonWriter {
         }
         UnsafeWriteRawBytes(b, e - b);
         RawWriteChar('"');
-    } 
- 
+    }
+
     inline void TBuf::RawWriteChar(char c) {
         Stream->Write(c);
     }
- 
+
     void TBuf::WriteHexEscape(unsigned char c) {
         Y_ASSERT(c < 0x80);
         UnsafeWriteRawBytes("\\u00", 4);
@@ -319,13 +319,13 @@ namespace NJsonWriter {
         RawWriteChar(hexDigits[(c & 0xf0) >> 4]);
         RawWriteChar(hexDigits[(c & 0x0f)]);
     }
- 
+
 #define MATCH(sym, string)                        \
     case sym:                                     \
         UnsafeWriteRawBytes(beg, cur - beg);      \
         UnsafeWriteRawBytes(TStringBuf(string));  \
         return true
- 
+
     inline bool TBuf::EscapedWriteChar(const char* beg, const char* cur, EHtmlEscapeMode hem) {
         unsigned char c = *cur;
         if (hem == HEM_ESCAPE_HTML) {
@@ -337,11 +337,11 @@ namespace NJsonWriter {
                 MATCH('&', "&amp;");
             }
             //for other characters, we fall through to the non-HTML-escaped part
-        } 
- 
+        }
+
         if (hem == HEM_RELAXED && c == '/')
             return false;
- 
+
         if (hem != HEM_UNSAFE) {
             switch (c) {
                 case '/':
@@ -356,16 +356,16 @@ namespace NJsonWriter {
                     return true;
             }
             // for other characters, fall through to the non-escaped part
-        } 
- 
+        }
+
         switch (c) {
-            MATCH('"', "\\\""); 
-            MATCH('\\', "\\\\"); 
-            MATCH('\b', "\\b"); 
-            MATCH('\f', "\\f"); 
-            MATCH('\n', "\\n"); 
-            MATCH('\r', "\\r"); 
-            MATCH('\t', "\\t"); 
+            MATCH('"', "\\\"");
+            MATCH('\\', "\\\\");
+            MATCH('\b', "\\b");
+            MATCH('\f', "\\f");
+            MATCH('\n', "\\n");
+            MATCH('\r', "\\r");
+            MATCH('\t', "\\t");
         }
         if (c < 0x20) {
             UnsafeWriteRawBytes(beg, cur - beg);
@@ -374,14 +374,14 @@ namespace NJsonWriter {
         }
 
         return false;
-    } 
+    }
 
 #undef MATCH
 
     static bool LessStrPtr(const TString* a, const TString* b) {
         return *a < *b;
     }
- 
+
     TValueContext TBuf::WriteJsonValue(const NJson::TJsonValue* v, bool sortKeys, EFloatToStringMode mode, int ndigits) {
         using namespace NJson;
         switch (v->GetType()) {
@@ -411,7 +411,7 @@ namespace NJsonWriter {
                     WriteJsonValue(&it, sortKeys, mode, ndigits);
                 EndList();
                 break;
-            } 
+            }
             case JSON_MAP: {
                 BeginObject();
                 const TJsonValue::TMapType& map = v->GetMap();
@@ -436,10 +436,10 @@ namespace NJsonWriter {
                 }
                 EndObject();
                 break;
-            } 
-        } 
+            }
+        }
         return TValueContext(*this);
-    } 
+    }
 
     TPairContext TBuf::UnsafeWritePair(const TStringBuf& s) {
         if (Y_UNLIKELY(StackTop() != JE_OBJECT)) {
@@ -448,28 +448,28 @@ namespace NJsonWriter {
         WriteComma();
         UnsafeWriteRawBytes(s);
         return TPairContext(*this);
-    } 
- 
+    }
+
     void TBuf::UnsafeWriteValue(const TStringBuf& s) {
         BeginValue();
         UnsafeWriteRawBytes(s);
         EndValue();
-    } 
- 
+    }
+
     void TBuf::UnsafeWriteValue(const char* s, size_t len) {
         BeginValue();
         UnsafeWriteRawBytes(s, len);
         EndValue();
     }
- 
+
     void TBuf::UnsafeWriteRawBytes(const char* src, size_t len) {
         Stream->Write(src, len);
     }
- 
+
     void TBuf::UnsafeWriteRawBytes(const TStringBuf& s) {
         UnsafeWriteRawBytes(s.data(), s.size());
     }
- 
+
     const TString& TBuf::Str() const {
         if (!StringStream) {
             ythrow TError() << "JSON writer: Str() called "
@@ -480,7 +480,7 @@ namespace NJsonWriter {
         }
         return StringStream->Str();
     }
- 
+
     void TBuf::FlushTo(IOutputStream* stream) {
         if (!StringStream) {
             ythrow TError() << "JSON writer: FlushTo() called "
@@ -488,7 +488,7 @@ namespace NJsonWriter {
         }
         stream->Write(StringStream->Str());
         StringStream->Clear();
-    } 
+    }
 
     TString WrapJsonToCallback(const TBuf& buf, TStringBuf callback) {
         if (!callback) {
@@ -496,12 +496,12 @@ namespace NJsonWriter {
         } else {
             return TString::Join(callback, "(", buf.Str(), ")");
         }
-    } 
- 
+    }
+
     TBufState TBuf::State() const {
         return TBufState{NeedComma, NeedNewline, Stack};
-    } 
- 
+    }
+
     void TBuf::Reset(const TBufState& from) {
         NeedComma = from.NeedComma;
         NeedNewline = from.NeedNewline;
diff --git a/library/cpp/json/writer/json.h b/library/cpp/json/writer/json.h
index f8e0783574..0aae2531b9 100644
--- a/library/cpp/json/writer/json.h
+++ b/library/cpp/json/writer/json.h
@@ -1,38 +1,38 @@
-#pragma once 
- 
-#include <util/generic/noncopyable.h> 
-#include <util/generic/ptr.h> 
+#pragma once
+
+#include <util/generic/noncopyable.h>
+#include <util/generic/ptr.h>
 #include <util/generic/string.h>
-#include <util/generic/vector.h> 
-#include <util/generic/yexception.h> 
-#include <util/stream/str.h> 
+#include <util/generic/vector.h>
+#include <util/generic/yexception.h>
+#include <util/stream/str.h>
 #include <util/string/cast.h>
- 
-namespace NJson { 
-    class TJsonValue; 
-} 
- 
-namespace NJsonWriter { 
+
+namespace NJson {
+    class TJsonValue;
+}
+
+namespace NJsonWriter {
     enum EJsonEntity : ui8 {
-        JE_OUTER_SPACE = 1, 
-        JE_LIST, 
-        JE_OBJECT, 
-        JE_PAIR, 
-    }; 
- 
-    enum EHtmlEscapeMode { 
-        HEM_ESCAPE_HTML = 1,  // Use HTML escaping: &lt; &gt; &amp; \/ 
-        HEM_DONT_ESCAPE_HTML, // Use JSON escaping: \u003C \u003E \u0026 \/ 
-        HEM_RELAXED,          // Use JSON escaping: \u003C \u003E \u0026 / 
-        HEM_UNSAFE,           // Turn escaping off: < > & / 
-    }; 
- 
-    class TError: public yexception {}; 
- 
-    class TValueContext; 
-    class TPairContext; 
-    class TAfterColonContext; 
- 
+        JE_OUTER_SPACE = 1,
+        JE_LIST,
+        JE_OBJECT,
+        JE_PAIR,
+    };
+
+    enum EHtmlEscapeMode {
+        HEM_ESCAPE_HTML = 1,  // Use HTML escaping: &lt; &gt; &amp; \/
+        HEM_DONT_ESCAPE_HTML, // Use JSON escaping: \u003C \u003E \u0026 \/
+        HEM_RELAXED,          // Use JSON escaping: \u003C \u003E \u0026 /
+        HEM_UNSAFE,           // Turn escaping off: < > & /
+    };
+
+    class TError: public yexception {};
+
+    class TValueContext;
+    class TPairContext;
+    class TAfterColonContext;
+
     struct TBufState {
         bool NeedComma;
         bool NeedNewline;
@@ -40,102 +40,102 @@ namespace NJsonWriter {
     };
 
     class TBuf : TNonCopyable {
-    public: 
+    public:
         TBuf(EHtmlEscapeMode mode = HEM_DONT_ESCAPE_HTML, IOutputStream* stream = nullptr);
- 
+
         TValueContext WriteString(const TStringBuf& s, EHtmlEscapeMode hem);
         TValueContext WriteString(const TStringBuf& s);
-        TValueContext WriteInt(int i); 
+        TValueContext WriteInt(int i);
         TValueContext WriteLongLong(long long i);
         TValueContext WriteULongLong(unsigned long long i);
         TValueContext WriteFloat(float f, EFloatToStringMode mode = PREC_NDIGITS, int ndigits = 6);
         TValueContext WriteDouble(double f, EFloatToStringMode mode = PREC_NDIGITS, int ndigits = 10);
-        TValueContext WriteBool(bool b); 
-        TValueContext WriteNull(); 
+        TValueContext WriteBool(bool b);
+        TValueContext WriteNull();
         TValueContext WriteJsonValue(const NJson::TJsonValue* value, bool sortKeys = false, EFloatToStringMode mode = PREC_NDIGITS, int ndigits = 10);
- 
-        TValueContext BeginList(); 
-        TBuf& EndList(); 
- 
-        TPairContext BeginObject(); 
+
+        TValueContext BeginList();
+        TBuf& EndList();
+
+        TPairContext BeginObject();
         TAfterColonContext WriteKey(const TStringBuf& key, EHtmlEscapeMode hem);
         TAfterColonContext WriteKey(const TStringBuf& key);
         TAfterColonContext UnsafeWriteKey(const TStringBuf& key);
         bool KeyExpected() const {
             return Stack.back() == JE_OBJECT;
         }
- 
-        //! deprecated, do not use in new code 
+
+        //! deprecated, do not use in new code
         TAfterColonContext CompatWriteKeyWithoutQuotes(const TStringBuf& key);
- 
-        TBuf& EndObject(); 
- 
-        /*** Indent the resulting JSON with spaces. 
-           * By default (spaces==0) no formatting is done.                */ 
-        TBuf& SetIndentSpaces(int spaces) { 
-            IndentSpaces = spaces; 
-            return *this; 
-        } 
- 
+
+        TBuf& EndObject();
+
+        /*** Indent the resulting JSON with spaces.
+           * By default (spaces==0) no formatting is done.                */
+        TBuf& SetIndentSpaces(int spaces) {
+            IndentSpaces = spaces;
+            return *this;
+        }
+
         /*** NaN and Inf are not valid json values,
            * so if WriteNanAsString is set, writer would write string
            * intead of throwing exception (default case)                  */
-        TBuf& SetWriteNanAsString(bool writeNanAsString = true) { 
+        TBuf& SetWriteNanAsString(bool writeNanAsString = true) {
             WriteNanAsString = writeNanAsString;
-            return *this; 
+            return *this;
         }
 
-        /*** Return the string formed in the internal TStringStream. 
-           * You may only call it if the `stream' parameter was NULL 
-           * at construction time.                                        */ 
+        /*** Return the string formed in the internal TStringStream.
+           * You may only call it if the `stream' parameter was NULL
+           * at construction time.                                        */
         const TString& Str() const;
- 
-        /*** Dump and forget the string constructed so far. 
-           * You may only call it if the `stream' parameter was NULL 
-           * at construction time.                                        */ 
+
+        /*** Dump and forget the string constructed so far.
+           * You may only call it if the `stream' parameter was NULL
+           * at construction time.                                        */
         void FlushTo(IOutputStream* stream);
- 
-        /*** Write a literal string that represents a JSON value 
-           * (string, number, object, array, bool, or null). 
-           * 
-           * Example: 
-           * j.UnsafeWriteValue("[1, 2, 3, \"o'clock\", 4, \"o'clock rock\"]"); 
-           * 
-           * As in all of the Unsafe* functions, no escaping is done.     */ 
+
+        /*** Write a literal string that represents a JSON value
+           * (string, number, object, array, bool, or null).
+           *
+           * Example:
+           * j.UnsafeWriteValue("[1, 2, 3, \"o'clock\", 4, \"o'clock rock\"]");
+           *
+           * As in all of the Unsafe* functions, no escaping is done.     */
         void UnsafeWriteValue(const TStringBuf& s);
-        void UnsafeWriteValue(const char* s, size_t len); 
- 
-        /*** When in the context of an object, write a literal string 
-           * that represents a key:value pair (or several pairs). 
-           * 
-           * Example: 
-           * j.BeginObject(); 
-           * j.UnsafeWritePair("\"adam\": \"male\", \"eve\": \"female\""); 
-           * j.EndObject(); 
-           * 
-           * As in all of the Unsafe* functions, no escaping is done.     */ 
+        void UnsafeWriteValue(const char* s, size_t len);
+
+        /*** When in the context of an object, write a literal string
+           * that represents a key:value pair (or several pairs).
+           *
+           * Example:
+           * j.BeginObject();
+           * j.UnsafeWritePair("\"adam\": \"male\", \"eve\": \"female\"");
+           * j.EndObject();
+           *
+           * As in all of the Unsafe* functions, no escaping is done.     */
         TPairContext UnsafeWritePair(const TStringBuf& s);
- 
-        /*** Copy the supplied string directly into the output stream.    */ 
+
+        /*** Copy the supplied string directly into the output stream.    */
         void UnsafeWriteRawBytes(const TStringBuf& s);
-        void UnsafeWriteRawBytes(const char* c, size_t len); 
- 
+        void UnsafeWriteRawBytes(const char* c, size_t len);
+
         TBufState State() const;
         void Reset(const TBufState& from);
         void Reset(TBufState&& from);
 
-    private: 
-        void BeginValue(); 
-        void EndValue(); 
-        void BeginKey(); 
-        void RawWriteChar(char c); 
+    private:
+        void BeginValue();
+        void EndValue();
+        void BeginKey();
+        void RawWriteChar(char c);
         bool EscapedWriteChar(const char* b, const char* c, EHtmlEscapeMode hem);
         void WriteBareString(const TStringBuf s, EHtmlEscapeMode hem);
-        void WriteComma(); 
-        void PrintIndentation(bool closing); 
+        void WriteComma();
+        void PrintIndentation(bool closing);
         void PrintWhitespaces(size_t count, bool prependWithNewLine);
-        void WriteHexEscape(unsigned char c); 
- 
+        void WriteHexEscape(unsigned char c);
+
         void StackPush(EJsonEntity e);
         void StackPop();
         void CheckAndPop(EJsonEntity e);
@@ -146,23 +146,23 @@ namespace NJsonWriter {
 
     private:
         IOutputStream* Stream;
-        THolder<TStringStream> StringStream; 
+        THolder<TStringStream> StringStream;
         typedef TVector<const TString*> TKeys;
         TKeys Keys;
 
         TVector<EJsonEntity> Stack;
-        bool NeedComma; 
+        bool NeedComma;
         bool NeedNewline;
-        const EHtmlEscapeMode EscapeMode; 
-        int IndentSpaces; 
+        const EHtmlEscapeMode EscapeMode;
+        int IndentSpaces;
         bool WriteNanAsString;
-    }; 
- 
-    // Please don't try to instantiate the classes declared below this point. 
- 
+    };
+
+    // Please don't try to instantiate the classes declared below this point.
+
     template <typename TOutContext>
     class TValueWriter {
-    public: 
+    public:
         TOutContext WriteNull();
         TOutContext WriteString(const TStringBuf&);
         TOutContext WriteString(const TStringBuf& s, EHtmlEscapeMode hem);
@@ -177,82 +177,82 @@ namespace NJsonWriter {
         TOutContext WriteJsonValue(const NJson::TJsonValue* value, bool sortKeys = false);
         TOutContext UnsafeWriteValue(const TStringBuf&);
 
-        TValueContext BeginList(); 
-        TPairContext BeginObject(); 
- 
-    protected: 
-        TValueWriter(TBuf& buf) 
-            : Buf(buf) 
+        TValueContext BeginList();
+        TPairContext BeginObject();
+
+    protected:
+        TValueWriter(TBuf& buf)
+            : Buf(buf)
         {
         }
-        friend class TBuf; 
- 
-    protected: 
-        TBuf& Buf; 
-    }; 
- 
-    class TValueContext: public TValueWriter<TValueContext> { 
-    public: 
-        TBuf& EndList() { 
-            return Buf.EndList(); 
-        } 
+        friend class TBuf;
+
+    protected:
+        TBuf& Buf;
+    };
+
+    class TValueContext: public TValueWriter<TValueContext> {
+    public:
+        TBuf& EndList() {
+            return Buf.EndList();
+        }
         TString Str() const {
             return Buf.Str();
         }
 
-    private: 
-        TValueContext(TBuf& buf) 
-            : TValueWriter<TValueContext>(buf) 
+    private:
+        TValueContext(TBuf& buf)
+            : TValueWriter<TValueContext>(buf)
         {
         }
-        friend class TBuf; 
-        friend class TValueWriter<TValueContext>; 
-    }; 
- 
-    class TAfterColonContext: public TValueWriter<TPairContext> { 
-    private: 
+        friend class TBuf;
+        friend class TValueWriter<TValueContext>;
+    };
+
+    class TAfterColonContext: public TValueWriter<TPairContext> {
+    private:
         TAfterColonContext(TBuf& iBuf)
             : TValueWriter<TPairContext>(iBuf)
         {
         }
-        friend class TBuf; 
-        friend class TPairContext; 
-    }; 
- 
-    class TPairContext { 
-    public: 
+        friend class TBuf;
+        friend class TPairContext;
+    };
+
+    class TPairContext {
+    public:
         TAfterColonContext WriteKey(const TStringBuf& s, EHtmlEscapeMode hem) {
-            return Buf.WriteKey(s, hem); 
-        } 
+            return Buf.WriteKey(s, hem);
+        }
         TAfterColonContext WriteKey(const TStringBuf& s) {
-            return Buf.WriteKey(s); 
-        } 
+            return Buf.WriteKey(s);
+        }
         TAfterColonContext UnsafeWriteKey(const TStringBuf& s) {
             return Buf.UnsafeWriteKey(s);
         }
         TAfterColonContext CompatWriteKeyWithoutQuotes(const TStringBuf& s) {
-            return Buf.CompatWriteKeyWithoutQuotes(s); 
-        } 
+            return Buf.CompatWriteKeyWithoutQuotes(s);
+        }
         TPairContext UnsafeWritePair(const TStringBuf& s) {
-            return Buf.UnsafeWritePair(s); 
-        } 
-        TBuf& EndObject() { 
-            return Buf.EndObject(); 
-        } 
- 
-    private: 
-        TPairContext(TBuf& buf) 
-            : Buf(buf) 
+            return Buf.UnsafeWritePair(s);
+        }
+        TBuf& EndObject() {
+            return Buf.EndObject();
+        }
+
+    private:
+        TPairContext(TBuf& buf)
+            : Buf(buf)
         {
         }
- 
-        friend class TBuf; 
-        friend class TValueWriter<TPairContext>; 
- 
-    private: 
-        TBuf& Buf; 
-    }; 
- 
+
+        friend class TBuf;
+        friend class TValueWriter<TPairContext>;
+
+    private:
+        TBuf& Buf;
+    };
+
 #define JSON_VALUE_WRITER_WRAP(function, params, args)       \
     template <typename TOutContext>                          \
     TOutContext TValueWriter<TOutContext>::function params { \
@@ -277,13 +277,13 @@ namespace NJsonWriter {
 
     template <typename TOutContext>
     TValueContext TValueWriter<TOutContext>::BeginList() {
-        return Buf.BeginList(); 
-    } 
- 
+        return Buf.BeginList();
+    }
+
     template <typename TOutContext>
     TPairContext TValueWriter<TOutContext>::BeginObject() {
-        return Buf.BeginObject(); 
-    } 
+        return Buf.BeginObject();
+    }
 
     TString WrapJsonToCallback(const TBuf& buf, TStringBuf callback);
-} 
+}
diff --git a/library/cpp/json/writer/json_ut.cpp b/library/cpp/json/writer/json_ut.cpp
index d6842bcc6d..9980555683 100644
--- a/library/cpp/json/writer/json_ut.cpp
+++ b/library/cpp/json/writer/json_ut.cpp
@@ -1,191 +1,191 @@
 #include <library/cpp/testing/unittest/registar.h>
 #include <util/system/sanitizers.h>
- 
-#include "json.h" 
+
+#include "json.h"
 #include <library/cpp/json/json_value.h>
- 
+
 #include <limits>
 
 Y_UNIT_TEST_SUITE(JsonWriter) {
     Y_UNIT_TEST(Struct) {
-        NJsonWriter::TBuf w; 
-        w.BeginList(); 
-        w.BeginObject() 
-            .WriteKey("key") 
-            .WriteString("value") 
-            .UnsafeWritePair("\"xk\":13") 
-            .WriteKey("key2") 
-            .BeginList() 
+        NJsonWriter::TBuf w;
+        w.BeginList();
+        w.BeginObject()
+            .WriteKey("key")
+            .WriteString("value")
+            .UnsafeWritePair("\"xk\":13")
+            .WriteKey("key2")
+            .BeginList()
             .BeginObject()
             .EndObject()
             .BeginObject()
             .EndObject()
-            .EndList() 
+            .EndList()
             .EndObject();
-        w.WriteInt(43); 
-        w.UnsafeWriteValue("\"x\""); 
-        w.WriteString("..."); 
-        w.EndList(); 
-        const char* exp = "[{\"key\":\"value\",\"xk\":13,\"key2\":[{},{}]},43,\"x\",\"...\"]"; 
-        UNIT_ASSERT_EQUAL(w.Str(), exp); 
-    } 
+        w.WriteInt(43);
+        w.UnsafeWriteValue("\"x\"");
+        w.WriteString("...");
+        w.EndList();
+        const char* exp = "[{\"key\":\"value\",\"xk\":13,\"key2\":[{},{}]},43,\"x\",\"...\"]";
+        UNIT_ASSERT_EQUAL(w.Str(), exp);
+    }
     Y_UNIT_TEST(EscapedString) {
-        NJsonWriter::TBuf w(NJsonWriter::HEM_ESCAPE_HTML); 
-        w.WriteString(" \n \r \t \007 \b \f ' <tag> &ent; \"txt\" "); 
+        NJsonWriter::TBuf w(NJsonWriter::HEM_ESCAPE_HTML);
+        w.WriteString(" \n \r \t \007 \b \f ' <tag> &ent; \"txt\" ");
         TString ws = w.Str();
-        const char* exp = "\" \\n \\r \\t \\u0007 \\b \\f &#39; &lt;tag&gt; &amp;ent; &quot;txt&quot; \""; 
-        UNIT_ASSERT_STRINGS_EQUAL(ws.c_str(), exp); 
-    } 
+        const char* exp = "\" \\n \\r \\t \\u0007 \\b \\f &#39; &lt;tag&gt; &amp;ent; &quot;txt&quot; \"";
+        UNIT_ASSERT_STRINGS_EQUAL(ws.c_str(), exp);
+    }
     Y_UNIT_TEST(UnescapedString) {
-        NJsonWriter::TBuf w; 
-        w.WriteString(" \n \r \t \b \f '; -- <tag> &ent; \"txt\"", NJsonWriter::HEM_DONT_ESCAPE_HTML); 
+        NJsonWriter::TBuf w;
+        w.WriteString(" \n \r \t \b \f '; -- <tag> &ent; \"txt\"", NJsonWriter::HEM_DONT_ESCAPE_HTML);
         TString ws = w.Str();
-        const char* exp = "\" \\n \\r \\t \\b \\f \\u0027; -- \\u003Ctag\\u003E &ent; \\\"txt\\\"\""; 
-        UNIT_ASSERT_STRINGS_EQUAL(ws.c_str(), exp); 
-    } 
+        const char* exp = "\" \\n \\r \\t \\b \\f \\u0027; -- \\u003Ctag\\u003E &ent; \\\"txt\\\"\"";
+        UNIT_ASSERT_STRINGS_EQUAL(ws.c_str(), exp);
+    }
     Y_UNIT_TEST(UnescapedChaining) {
-        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML); 
-        w.UnsafeWriteRawBytes("(", 1); 
-        w.BeginList().WriteString("<>&'\\").BeginList(); 
-        w.EndList().EndList(); 
+        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML);
+        w.UnsafeWriteRawBytes("(", 1);
+        w.BeginList().WriteString("<>&'\\").BeginList();
+        w.EndList().EndList();
         TString ws = w.Str();
-        const char* exp = "([\"\\u003C\\u003E&\\u0027\\\\\",[]]"; 
-        UNIT_ASSERT_STRINGS_EQUAL(ws.c_str(), exp); 
-    } 
+        const char* exp = "([\"\\u003C\\u003E&\\u0027\\\\\",[]]";
+        UNIT_ASSERT_STRINGS_EQUAL(ws.c_str(), exp);
+    }
     Y_UNIT_TEST(Utf8) {
         TString ws = NJsonWriter::TBuf().WriteString("яЯ σΣ ש א").Str();
-        const char* exp = "\"яЯ σΣ ש א\""; 
-        UNIT_ASSERT_STRINGS_EQUAL(ws.c_str(), exp); 
-    } 
+        const char* exp = "\"яЯ σΣ ש א\"";
+        UNIT_ASSERT_STRINGS_EQUAL(ws.c_str(), exp);
+    }
     Y_UNIT_TEST(WrongObject) {
-        NJsonWriter::TBuf w; 
-        w.BeginObject(); 
-        UNIT_ASSERT_EXCEPTION(w.WriteString("hehe"), NJsonWriter::TError); 
-    } 
+        NJsonWriter::TBuf w;
+        w.BeginObject();
+        UNIT_ASSERT_EXCEPTION(w.WriteString("hehe"), NJsonWriter::TError);
+    }
     Y_UNIT_TEST(WrongList) {
-        NJsonWriter::TBuf w; 
-        w.BeginList(); 
-        UNIT_ASSERT_EXCEPTION(w.WriteKey("hehe"), NJsonWriter::TError); 
-    } 
+        NJsonWriter::TBuf w;
+        w.BeginList();
+        UNIT_ASSERT_EXCEPTION(w.WriteKey("hehe"), NJsonWriter::TError);
+    }
     Y_UNIT_TEST(Incomplete) {
-        NJsonWriter::TBuf w; 
-        w.BeginList(); 
-        UNIT_ASSERT_EXCEPTION(w.Str(), NJsonWriter::TError); 
-    } 
+        NJsonWriter::TBuf w;
+        w.BeginList();
+        UNIT_ASSERT_EXCEPTION(w.Str(), NJsonWriter::TError);
+    }
     Y_UNIT_TEST(BareKey) {
-        NJsonWriter::TBuf w; 
-        w.BeginObject() 
+        NJsonWriter::TBuf w;
+        w.BeginObject()
             .CompatWriteKeyWithoutQuotes("p")
             .WriteInt(1)
             .CompatWriteKeyWithoutQuotes("n")
             .WriteInt(0)
             .EndObject();
         TString ws = w.Str();
-        const char* exp = "{p:1,n:0}"; 
-        UNIT_ASSERT_STRINGS_EQUAL(ws.c_str(), exp); 
-    } 
+        const char* exp = "{p:1,n:0}";
+        UNIT_ASSERT_STRINGS_EQUAL(ws.c_str(), exp);
+    }
     Y_UNIT_TEST(UnescapedStringInObject) {
-        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML); 
-        w.BeginObject().WriteKey("key").WriteString("</&>'").EndObject(); 
+        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML);
+        w.BeginObject().WriteKey("key").WriteString("</&>'").EndObject();
         TString ws = w.Str();
-        const char* exp = "{\"key\":\"\\u003C\\/&\\u003E\\u0027\"}"; 
-        UNIT_ASSERT_STRINGS_EQUAL(ws.c_str(), exp); 
-    } 
+        const char* exp = "{\"key\":\"\\u003C\\/&\\u003E\\u0027\"}";
+        UNIT_ASSERT_STRINGS_EQUAL(ws.c_str(), exp);
+    }
     Y_UNIT_TEST(ForeignStreamStr) {
-        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML, &Cerr); 
-        UNIT_ASSERT_EXCEPTION(w.Str(), NJsonWriter::TError); 
-    } 
+        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML, &Cerr);
+        UNIT_ASSERT_EXCEPTION(w.Str(), NJsonWriter::TError);
+    }
     Y_UNIT_TEST(ForeignStreamValue) {
-        TStringStream ss; 
-        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML, &ss); 
-        w.WriteInt(1543); 
-        UNIT_ASSERT_STRINGS_EQUAL(ss.Str(), "1543"); 
-    } 
+        TStringStream ss;
+        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML, &ss);
+        w.WriteInt(1543);
+        UNIT_ASSERT_STRINGS_EQUAL(ss.Str(), "1543");
+    }
     Y_UNIT_TEST(Indentation) {
-        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML); 
-        w.SetIndentSpaces(2); 
-        w.BeginList() 
-            .WriteInt(1) 
-            .WriteString("hello") 
-            .BeginObject() 
+        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML);
+        w.SetIndentSpaces(2);
+        w.BeginList()
+            .WriteInt(1)
+            .WriteString("hello")
+            .BeginObject()
             .WriteKey("abc")
             .WriteInt(3)
             .WriteKey("def")
             .WriteInt(4)
-            .EndObject() 
+            .EndObject()
             .EndList();
-        const char* exp = "[\n" 
-                          "  1,\n" 
-                          "  \"hello\",\n" 
-                          "  {\n" 
+        const char* exp = "[\n"
+                          "  1,\n"
+                          "  \"hello\",\n"
+                          "  {\n"
                           "    \"abc\":3,\n"
                           "    \"def\":4\n"
-                          "  }\n" 
-                          "]"; 
-        UNIT_ASSERT_STRINGS_EQUAL(exp, w.Str()); 
-    } 
+                          "  }\n"
+                          "]";
+        UNIT_ASSERT_STRINGS_EQUAL(exp, w.Str());
+    }
     Y_UNIT_TEST(WriteJsonValue) {
-        using namespace NJson; 
-        TJsonValue val; 
-        val.AppendValue(1); 
-        val.AppendValue("2"); 
-        val.AppendValue(3.5); 
-        TJsonValue obj; 
-        obj.InsertValue("key", TJsonValue("value")); 
- 
-        val.AppendValue(obj); 
-        val.AppendValue(TJsonValue(JSON_NULL)); 
- 
-        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML); 
-        w.WriteJsonValue(&val); 
- 
-        const char exp[] = "[1,\"2\",3.5,{\"key\":\"value\"},null]"; 
-        UNIT_ASSERT_STRINGS_EQUAL(exp, w.Str()); 
-    } 
+        using namespace NJson;
+        TJsonValue val;
+        val.AppendValue(1);
+        val.AppendValue("2");
+        val.AppendValue(3.5);
+        TJsonValue obj;
+        obj.InsertValue("key", TJsonValue("value"));
+
+        val.AppendValue(obj);
+        val.AppendValue(TJsonValue(JSON_NULL));
+
+        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML);
+        w.WriteJsonValue(&val);
+
+        const char exp[] = "[1,\"2\",3.5,{\"key\":\"value\"},null]";
+        UNIT_ASSERT_STRINGS_EQUAL(exp, w.Str());
+    }
     Y_UNIT_TEST(WriteJsonValueSorted) {
-        using namespace NJson; 
-        TJsonValue val; 
-        val.InsertValue("1", TJsonValue(1)); 
-        val.InsertValue("2", TJsonValue(2)); 
- 
-        TJsonValue obj; 
-        obj.InsertValue("zero", TJsonValue(0)); 
-        obj.InsertValue("succ", TJsonValue(1)); 
-        val.InsertValue("0", obj); 
- 
-        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML); 
-        w.WriteJsonValue(&val, true); 
- 
-        const char exp[] = "{\"0\":{\"succ\":1,\"zero\":0},\"1\":1,\"2\":2}"; 
-        UNIT_ASSERT_STRINGS_EQUAL(exp, w.Str()); 
-    } 
+        using namespace NJson;
+        TJsonValue val;
+        val.InsertValue("1", TJsonValue(1));
+        val.InsertValue("2", TJsonValue(2));
+
+        TJsonValue obj;
+        obj.InsertValue("zero", TJsonValue(0));
+        obj.InsertValue("succ", TJsonValue(1));
+        val.InsertValue("0", obj);
+
+        NJsonWriter::TBuf w(NJsonWriter::HEM_DONT_ESCAPE_HTML);
+        w.WriteJsonValue(&val, true);
+
+        const char exp[] = "{\"0\":{\"succ\":1,\"zero\":0},\"1\":1,\"2\":2}";
+        UNIT_ASSERT_STRINGS_EQUAL(exp, w.Str());
+    }
     Y_UNIT_TEST(Unescaped) {
-        NJsonWriter::TBuf buf(NJsonWriter::HEM_UNSAFE); 
-        buf.WriteString("</security>'"); 
-        UNIT_ASSERT_STRINGS_EQUAL("\"</security>'\"", buf.Str()); 
-    } 
+        NJsonWriter::TBuf buf(NJsonWriter::HEM_UNSAFE);
+        buf.WriteString("</security>'");
+        UNIT_ASSERT_STRINGS_EQUAL("\"</security>'\"", buf.Str());
+    }
     Y_UNIT_TEST(LittleBobbyJsonp) {
-        NJsonWriter::TBuf buf; 
-        buf.WriteString("hello\xe2\x80\xa8\xe2\x80\xa9stranger"); 
-        UNIT_ASSERT_STRINGS_EQUAL("\"hello\\u2028\\u2029stranger\"", buf.Str()); 
-    } 
+        NJsonWriter::TBuf buf;
+        buf.WriteString("hello\xe2\x80\xa8\xe2\x80\xa9stranger");
+        UNIT_ASSERT_STRINGS_EQUAL("\"hello\\u2028\\u2029stranger\"", buf.Str());
+    }
     Y_UNIT_TEST(LittleBobbyInvalid) {
-        NJsonWriter::TBuf buf; 
-        TStringBuf incomplete("\xe2\x80\xa8", 2); 
-        buf.WriteString(incomplete); 
-        // garbage in - garbage out 
-        UNIT_ASSERT_STRINGS_EQUAL("\"\xe2\x80\"", buf.Str()); 
-    } 
+        NJsonWriter::TBuf buf;
+        TStringBuf incomplete("\xe2\x80\xa8", 2);
+        buf.WriteString(incomplete);
+        // garbage in - garbage out
+        UNIT_ASSERT_STRINGS_EQUAL("\"\xe2\x80\"", buf.Str());
+    }
     Y_UNIT_TEST(OverlyZealous) {
-        NJsonWriter::TBuf buf; 
-        buf.WriteString("—"); 
-        UNIT_ASSERT_STRINGS_EQUAL("\"—\"", buf.Str()); 
-    } 
+        NJsonWriter::TBuf buf;
+        buf.WriteString("—");
+        UNIT_ASSERT_STRINGS_EQUAL("\"—\"", buf.Str());
+    }
     Y_UNIT_TEST(RelaxedEscaping) {
-        NJsonWriter::TBuf buf(NJsonWriter::HEM_RELAXED); 
-        buf.WriteString("</>"); 
-        UNIT_ASSERT_STRINGS_EQUAL("\"\\u003C/\\u003E\"", buf.Str()); 
-    } 
+        NJsonWriter::TBuf buf(NJsonWriter::HEM_RELAXED);
+        buf.WriteString("</>");
+        UNIT_ASSERT_STRINGS_EQUAL("\"\\u003C/\\u003E\"", buf.Str());
+    }
 
     Y_UNIT_TEST(FloatFormatting) {
         NJsonWriter::TBuf buf(NJsonWriter::HEM_DONT_ESCAPE_HTML);
@@ -304,4 +304,4 @@ Y_UNIT_TEST_SUITE(JsonWriter) {
         // doesn't really matter
         UNIT_ASSERT(!p.empty());
     }
-} 
+}
diff --git a/library/cpp/json/writer/json_value.cpp b/library/cpp/json/writer/json_value.cpp
index 26fa35eed3..c61e8d1dc4 100644
--- a/library/cpp/json/writer/json_value.cpp
+++ b/library/cpp/json/writer/json_value.cpp
@@ -1,5 +1,5 @@
 #include "json_value.h"
-#include "json.h" 
+#include "json.h"
 
 #include <util/generic/ymath.h>
 #include <util/generic/ylimits.h>
@@ -161,7 +161,7 @@ namespace NJson {
         Value.Double = value;
     }
 
-    TJsonValue::TJsonValue(TString value) { 
+    TJsonValue::TJsonValue(TString value) {
         SetType(JSON_STRING);
         Value.String = std::move(value);
     }
@@ -1100,6 +1100,6 @@ namespace NJson {
 
 template <>
 void Out<NJson::TJsonValue>(IOutputStream& out, const NJson::TJsonValue& v) {
-    NJsonWriter::TBuf buf(NJsonWriter::HEM_DONT_ESCAPE_HTML, &out); 
-    buf.WriteJsonValue(&v); 
+    NJsonWriter::TBuf buf(NJsonWriter::HEM_DONT_ESCAPE_HTML, &out);
+    buf.WriteJsonValue(&v);
 }
diff --git a/library/cpp/json/writer/json_value.h b/library/cpp/json/writer/json_value.h
index b24029b8bb..3f0f50bc4c 100644
--- a/library/cpp/json/writer/json_value.h
+++ b/library/cpp/json/writer/json_value.h
@@ -48,7 +48,7 @@ namespace NJson {
         TJsonValue(long long value) noexcept;
         TJsonValue(unsigned long long value) noexcept;
         TJsonValue(double value) noexcept;
-        TJsonValue(TString value); 
+        TJsonValue(TString value);
         TJsonValue(const char* value);
         template <class T>
         TJsonValue(const T*) = delete;
diff --git a/library/cpp/json/writer/ya.make b/library/cpp/json/writer/ya.make
index cfbab3c818..3989ff3504 100644
--- a/library/cpp/json/writer/ya.make
+++ b/library/cpp/json/writer/ya.make
@@ -1,4 +1,4 @@
-LIBRARY() 
+LIBRARY()
 
 OWNER(
     mvel
@@ -9,12 +9,12 @@ OWNER(
 PEERDIR(
     library/cpp/json/common
 )
- 
-SRCS( 
-    json_value.cpp 
-    json.cpp 
-) 
- 
+
+SRCS(
+    json_value.cpp
+    json.cpp
+)
+
 GENERATE_ENUM_SERIALIZATION(json_value.h)
 
-END() 
+END()
diff --git a/library/cpp/packers/region_packer.h b/library/cpp/packers/region_packer.h
index 0e82475531..2c661cb5bc 100644
--- a/library/cpp/packers/region_packer.h
+++ b/library/cpp/packers/region_packer.h
@@ -1,18 +1,18 @@
 #pragma once
- 
+
 #include "packers.h"
 
 #include <util/generic/array_ref.h>
- 
-// Stores an array of PODs in the trie (copying them with memcpy). 
-// Byte order and alignment are your problem. 
- 
+
+// Stores an array of PODs in the trie (copying them with memcpy).
+// Byte order and alignment are your problem.
+
 template <class TRecord>
 class TRegionPacker {
 public:
     typedef TArrayRef<TRecord> TRecords;
 
-    void UnpackLeaf(const char* p, TRecords& result) const { 
+    void UnpackLeaf(const char* p, TRecords& result) const {
         size_t len;
         NPackers::TIntegralPacker<size_t>().UnpackLeaf(p, len);
         size_t start = NPackers::TIntegralPacker<size_t>().SkipLeaf(p);
@@ -32,7 +32,7 @@ public:
         return NPackers::TIntegralPacker<size_t>().MeasureLeaf(len) + len * sizeof(TRecord);
     }
 
-    size_t SkipLeaf(const char* p) const { 
+    size_t SkipLeaf(const char* p) const {
         size_t result = NPackers::TIntegralPacker<size_t>().SkipLeaf(p);
         size_t len;
         NPackers::TIntegralPacker<size_t>().UnpackLeaf(p, len);
diff --git a/library/cpp/packers/ut/region_packer_ut.cpp b/library/cpp/packers/ut/region_packer_ut.cpp
index 0da6a8b773..0cb08ccf65 100644
--- a/library/cpp/packers/ut/region_packer_ut.cpp
+++ b/library/cpp/packers/ut/region_packer_ut.cpp
@@ -1,40 +1,40 @@
-#include "region_packer.h" 
+#include "region_packer.h"
 #include <library/cpp/testing/unittest/registar.h>
- 
-template <typename TValue> 
-void TestPacker() { 
-    TValue values[] = {1, 2, 3, 42}; 
+
+template <typename TValue>
+void TestPacker() {
+    TValue values[] = {1, 2, 3, 42};
     TString buffer;
- 
-    TRegionPacker<TValue> p; 
- 
+
+    TRegionPacker<TValue> p;
+
     using TValues = TArrayRef<TValue>;
     TValues valueRegion = TValues(values, Y_ARRAY_SIZE(values));
-    size_t sz = p.MeasureLeaf(valueRegion); 
-    UNIT_ASSERT_VALUES_EQUAL(sz, 1 + sizeof(values)); 
- 
-    buffer.resize(sz); 
-    p.PackLeaf(buffer.begin(), valueRegion, sz); 
-    UNIT_ASSERT_VALUES_EQUAL(buffer[0], 4); 
- 
+    size_t sz = p.MeasureLeaf(valueRegion);
+    UNIT_ASSERT_VALUES_EQUAL(sz, 1 + sizeof(values));
+
+    buffer.resize(sz);
+    p.PackLeaf(buffer.begin(), valueRegion, sz);
+    UNIT_ASSERT_VALUES_EQUAL(buffer[0], 4);
+
     p.UnpackLeaf(buffer.data(), valueRegion);
     UNIT_ASSERT_EQUAL(valueRegion.data(), (const TValue*)(buffer.begin() + 1));
     UNIT_ASSERT_EQUAL(valueRegion.size(), Y_ARRAY_SIZE(values));
     UNIT_ASSERT_EQUAL(0, memcmp(values, valueRegion.data(), sizeof(values)));
-} 
- 
+}
+
 Y_UNIT_TEST_SUITE(RegionPacker) {
     Y_UNIT_TEST(Test0) {
-        TestPacker<char>(); 
-        TestPacker<signed char>(); 
-        TestPacker<unsigned char>(); 
-        TestPacker<i8>(); 
-        TestPacker<ui8>(); 
-        TestPacker<i16>(); 
-        TestPacker<ui16>(); 
-        TestPacker<i32>(); 
-        TestPacker<ui32>(); 
-        TestPacker<i64>(); 
-        TestPacker<ui64>(); 
-    } 
-} 
+        TestPacker<char>();
+        TestPacker<signed char>();
+        TestPacker<unsigned char>();
+        TestPacker<i8>();
+        TestPacker<ui8>();
+        TestPacker<i16>();
+        TestPacker<ui16>();
+        TestPacker<i32>();
+        TestPacker<ui32>();
+        TestPacker<i64>();
+        TestPacker<ui64>();
+    }
+}
diff --git a/library/cpp/protobuf/json/json2proto.h b/library/cpp/protobuf/json/json2proto.h
index fc2d21cc18..4c33498dfa 100644
--- a/library/cpp/protobuf/json/json2proto.h
+++ b/library/cpp/protobuf/json/json2proto.h
@@ -8,7 +8,7 @@
 
 #include <util/stream/input.h>
 #include <util/stream/str.h>
-#include <util/stream/mem.h> 
+#include <util/stream/mem.h>
 
 namespace google {
     namespace protobuf {
@@ -218,5 +218,5 @@ namespace NProtobufJson {
     T Json2Proto(const char* ptr, const TJson2ProtoConfig& config = TJson2ProtoConfig()) {
         return Json2Proto<T>(TStringBuf(ptr), config);
     }
- 
+
 }
diff --git a/library/cpp/sighandler/async_signals_handler.cpp b/library/cpp/sighandler/async_signals_handler.cpp
index f1b5a09c43..00ce1c18fb 100644
--- a/library/cpp/sighandler/async_signals_handler.cpp
+++ b/library/cpp/sighandler/async_signals_handler.cpp
@@ -215,14 +215,14 @@ void SetAsyncSignalHandler(int, TAutoPtr<TEventHandler>) {
 #endif
 
 namespace {
-    template <typename TFunc> 
-    class TFunctionEventHandler: public TEventHandler { 
-        TFunc Func; 
+    template <typename TFunc>
+    class TFunctionEventHandler: public TEventHandler {
+        TFunc Func;
 
     public:
-        TFunctionEventHandler(TFunc func) { 
-            if (func) 
-                Func = func; 
+        TFunctionEventHandler(TFunc func) {
+            if (func)
+                Func = func;
         }
 
         int Handle(int signum) override {
@@ -238,8 +238,8 @@ namespace {
 void SetAsyncSignalHandler(int signum, void (*handler)(int)) {
     SetAsyncSignalHandler(signum, new TFunctionEventHandler<void (*)(int)>(handler));
 }
- 
+
 void SetAsyncSignalFunction(int signum, std::function<void(int)> func) {
     typedef std::function<void(int)> TFunc;
-    SetAsyncSignalHandler(signum, new TFunctionEventHandler<TFunc>(func)); 
-} 
+    SetAsyncSignalHandler(signum, new TFunctionEventHandler<TFunc>(func));
+}
diff --git a/library/cpp/string_utils/levenshtein_diff/levenshtein_diff.h b/library/cpp/string_utils/levenshtein_diff/levenshtein_diff.h
index 5c8e4adb14..8a240bfed8 100644
--- a/library/cpp/string_utils/levenshtein_diff/levenshtein_diff.h
+++ b/library/cpp/string_utils/levenshtein_diff/levenshtein_diff.h
@@ -141,16 +141,16 @@ namespace NLevenshtein {
 
     template <class TStringType>
     size_t Distance(const TStringType& str1, const TStringType& str2) {
-        TEditChain editChain; 
-        GetEditChain(str1, str2, editChain); 
-        size_t result = 0; 
-        for (auto edit : editChain) { 
-            if (IsImportantEditMove(edit)) 
-                result++; 
-        } 
-        return result; 
-    } 
- 
+        TEditChain editChain;
+        GetEditChain(str1, str2, editChain);
+        size_t result = 0;
+        for (auto edit : editChain) {
+            if (IsImportantEditMove(edit))
+                result++;
+        }
+        return result;
+    }
+
     /// Calculates substrings to be replaced for str1->str2 transformation
     struct TReplacement {
         int CorrectOffset, CorrectLength, MisspelledOffset, MisspelledLength;
diff --git a/library/cpp/string_utils/levenshtein_diff/levenshtein_diff_ut.cpp b/library/cpp/string_utils/levenshtein_diff/levenshtein_diff_ut.cpp
index c5f2165854..cf0f78637f 100644
--- a/library/cpp/string_utils/levenshtein_diff/levenshtein_diff_ut.cpp
+++ b/library/cpp/string_utils/levenshtein_diff/levenshtein_diff_ut.cpp
@@ -1,7 +1,7 @@
 #include "levenshtein_diff.h"
- 
+
 #include <library/cpp/testing/unittest/registar.h>
- 
+
 #include <util/generic/string.h>
 
 namespace {
@@ -28,8 +28,8 @@ Y_UNIT_TEST_SUITE(Levenstein) {
     Y_UNIT_TEST(Distance) {
         UNIT_ASSERT_VALUES_EQUAL(NLevenshtein::Distance(TStringBuf("hello"), TStringBuf("hulloah")), 3);
         UNIT_ASSERT_VALUES_EQUAL(NLevenshtein::Distance(TStringBuf("yeoman"), TStringBuf("yo man")), 2);
-    } 
-} 
+    }
+}
 
 Y_UNIT_TEST_SUITE(WeightedLevenstein) {
     Y_UNIT_TEST(EqualStrings) {
diff --git a/library/cpp/string_utils/levenshtein_diff/ut/ya.make b/library/cpp/string_utils/levenshtein_diff/ut/ya.make
index 79130d6264..a3b9b8fea5 100644
--- a/library/cpp/string_utils/levenshtein_diff/ut/ya.make
+++ b/library/cpp/string_utils/levenshtein_diff/ut/ya.make
@@ -1,9 +1,9 @@
 UNITTEST_FOR(library/cpp/string_utils/levenshtein_diff)
 
-OWNER(myltsev) 
- 
+OWNER(myltsev)
+
 SRCS(
     levenshtein_diff_ut.cpp
 )
- 
-END() 
+
+END()
diff --git a/library/cpp/string_utils/ya.make b/library/cpp/string_utils/ya.make
index c802c438dc..cd731bda95 100644
--- a/library/cpp/string_utils/ya.make
+++ b/library/cpp/string_utils/ya.make
@@ -1,4 +1,4 @@
-RECURSE( 
+RECURSE(
     ascii_encode
     ascii_encode/ut
     base64
@@ -33,5 +33,5 @@ RECURSE(
     tskv_format/fuzz
     url
     url/ut
-    ztstrbuf 
-) 
+    ztstrbuf
+)
diff --git a/library/cpp/string_utils/ztstrbuf/ya.make b/library/cpp/string_utils/ztstrbuf/ya.make
index 10bdad091f..28b3f32f58 100644
--- a/library/cpp/string_utils/ztstrbuf/ya.make
+++ b/library/cpp/string_utils/ztstrbuf/ya.make
@@ -1,9 +1,9 @@
-LIBRARY() 
- 
-OWNER(myltsev) 
- 
-SRCS( 
-    ztstrbuf.cpp 
-) 
- 
-END() 
+LIBRARY()
+
+OWNER(myltsev)
+
+SRCS(
+    ztstrbuf.cpp
+)
+
+END()
diff --git a/library/cpp/string_utils/ztstrbuf/ztstrbuf.cpp b/library/cpp/string_utils/ztstrbuf/ztstrbuf.cpp
index 98f6cead1c..4a7269ff4a 100644
--- a/library/cpp/string_utils/ztstrbuf/ztstrbuf.cpp
+++ b/library/cpp/string_utils/ztstrbuf/ztstrbuf.cpp
@@ -1,8 +1,8 @@
-#include "ztstrbuf.h" 
- 
-#include <util/stream/output.h> 
- 
-template <> 
-void Out<TZtStringBuf>(IOutputStream& os, const TZtStringBuf& sb) { 
-    os << static_cast<const TStringBuf&>(sb); 
-} 
+#include "ztstrbuf.h"
+
+#include <util/stream/output.h>
+
+template <>
+void Out<TZtStringBuf>(IOutputStream& os, const TZtStringBuf& sb) {
+    os << static_cast<const TStringBuf&>(sb);
+}
diff --git a/library/cpp/string_utils/ztstrbuf/ztstrbuf.h b/library/cpp/string_utils/ztstrbuf/ztstrbuf.h
index 04c509bcc5..5fab768d8c 100644
--- a/library/cpp/string_utils/ztstrbuf/ztstrbuf.h
+++ b/library/cpp/string_utils/ztstrbuf/ztstrbuf.h
@@ -1,36 +1,36 @@
-#pragma once 
- 
-#include <util/generic/strbuf.h> 
+#pragma once
+
+#include <util/generic/strbuf.h>
 #include <util/generic/string.h>
- 
-/* 
- * Zero-terminated string view. 
- * 
- * Has a c_str() for use with system/cstdlib calls (like TString) 
- * but can be constructed from a string literal or command-line arg 
- * without memory allocation (like TStringBuf). 
- * 
- * Use it to reference filenames, thread names, string formats etc. 
- */ 
- 
-class TZtStringBuf: public TStringBuf { 
-public: 
-    TZtStringBuf(const char* s) 
-        : TStringBuf(s) 
-    { 
-    } 
- 
-    TZtStringBuf(const TString& s) 
-        : TStringBuf(s) 
-    { 
-    } 
- 
-    TZtStringBuf() 
-        : TZtStringBuf(TString{}) 
-    { 
-    } 
- 
-    const char* c_str() const { 
-        return data(); 
-    } 
-}; 
+
+/*
+ * Zero-terminated string view.
+ *
+ * Has a c_str() for use with system/cstdlib calls (like TString)
+ * but can be constructed from a string literal or command-line arg
+ * without memory allocation (like TStringBuf).
+ *
+ * Use it to reference filenames, thread names, string formats etc.
+ */
+
+class TZtStringBuf: public TStringBuf {
+public:
+    TZtStringBuf(const char* s)
+        : TStringBuf(s)
+    {
+    }
+
+    TZtStringBuf(const TString& s)
+        : TStringBuf(s)
+    {
+    }
+
+    TZtStringBuf()
+        : TZtStringBuf(TString{})
+    {
+    }
+
+    const char* c_str() const {
+        return data();
+    }
+};
diff --git a/library/cpp/xml/document/README b/library/cpp/xml/document/README
index c7396aec30..b2649523d8 100644
--- a/library/cpp/xml/document/README
+++ b/library/cpp/xml/document/README
@@ -1,20 +1,20 @@
-A wrapper around the DOM interface of libxml2. 
- 
-The standard way to use it is as follows: 
- 
+A wrapper around the DOM interface of libxml2.
+
+The standard way to use it is as follows:
+
     #include <library/cpp/xml/document/xml-document.h>
-    ... 
- 
-    // open a document 
-    NXml::TDocument xml("filename.xml"); 
- 
-    // get a nodeset from an XPath query 
-    NXml::TConstNodes nodes = xml.Root().Nodes("xpath/expression/here"); 
- 
-    // iterate over the nodeset 
-    for (size_t i = 0; i < nodes.size(); ++i) { 
+    ...
+
+    // open a document
+    NXml::TDocument xml("filename.xml");
+
+    // get a nodeset from an XPath query
+    NXml::TConstNodes nodes = xml.Root().Nodes("xpath/expression/here");
+
+    // iterate over the nodeset
+    for (size_t i = 0; i < nodes.size(); ++i) {
         using namespace NXml;
-        TConstNode& node = nodes[i]; 
+        TConstNode& node = nodes[i];
         // query node
         TString name = node.Name();
         TString lang = node.Attr<TString>("lang");
@@ -26,8 +26,8 @@ The standard way to use it is as follows:
         node.SetAttr("x", 2);
         node.SetValue(5);
         node.AddText(" apples");
-    } 
- 
+    }
+
     // edit documents with copy-paste
     NXml::TDocument xml2("<xpath><node/></xpath>", NXml::TDocument::String);
     NXml::TNode place = xml2.Root().Node("xpath/node");
@@ -39,4 +39,4 @@ The standard way to use it is as follows:
     TString modifiedDoc  = xml2.ToString("ISO-8559-1");
 
 
-See xml-document_ut.cpp for more examples. 
+See xml-document_ut.cpp for more examples.
diff --git a/library/cpp/xml/document/libxml-guards.h b/library/cpp/xml/document/libxml-guards.h
index 619ca23ce7..4188cecff1 100644
--- a/library/cpp/xml/document/libxml-guards.h
+++ b/library/cpp/xml/document/libxml-guards.h
@@ -2,10 +2,10 @@
 
 #include <library/cpp/xml/init/ptr.h>
 #include <util/generic/ptr.h>
-#include <libxml/xmlstring.h> 
-#include <libxml/tree.h> 
-#include <libxml/xpath.h> 
-#include <libxml/uri.h> 
+#include <libxml/xmlstring.h>
+#include <libxml/tree.h>
+#include <libxml/xpath.h>
+#include <libxml/uri.h>
 #include <libxml/xmlsave.h>
 
 namespace NXml {
@@ -36,15 +36,15 @@ namespace NXml {
 
     }
 
-    typedef TxmlXPathContextPtr TXPathContextPtr; 
-    typedef TxmlXPathObjectPtr TXPathObjectPtr; 
+    typedef TxmlXPathContextPtr TXPathContextPtr;
+    typedef TxmlXPathObjectPtr TXPathObjectPtr;
     typedef TAutoPtr<char, NDetail::TSignedCharPtrTraits> TSignedCharPtr;
     typedef TAutoPtr<xmlChar, NDetail::TCharPtrTraits> TCharPtr;
     typedef TxmlDocHolder TDocHolder;
-    typedef TxmlURIPtr TURIPtr; 
-    typedef TxmlNodePtr TNodePtr; 
+    typedef TxmlURIPtr TURIPtr;
+    typedef TxmlNodePtr TNodePtr;
     typedef TAutoPtr<xmlOutputBuffer, NDetail::TOutputBufferPtrTraits> TOutputBufferPtr;
-    typedef TxmlParserCtxtPtr TParserCtxtPtr; 
+    typedef TxmlParserCtxtPtr TParserCtxtPtr;
     typedef TAutoPtr<xmlSaveCtxt, NDetail::TSaveCtxtPtrTraits> TSaveCtxtPtr;
 
 }
diff --git a/library/cpp/xml/document/node-attr.h b/library/cpp/xml/document/node-attr.h
index 2642eb96f9..6e74403943 100644
--- a/library/cpp/xml/document/node-attr.h
+++ b/library/cpp/xml/document/node-attr.h
@@ -1,24 +1,24 @@
 #pragma once
 
 #include "xml-document-decl.h"
-#include "libxml-guards.h" 
+#include "libxml-guards.h"
 #include <util/stream/str.h>
 #include <util/string/cast.h>
 
 namespace NXml {
 #define THROW(x, y) ythrow yexception() << #x << ": " << y
 
-    // libxml defines unsigned char -> xmlChar, 
-    // and all functions use xmlChar. 
+    // libxml defines unsigned char -> xmlChar,
+    // and all functions use xmlChar.
     inline static const char* CAST2CHAR(const xmlChar* x) {
         return reinterpret_cast<const char*>(x);
     }
     inline static const xmlChar* XMLCHAR(const char* x) {
         return reinterpret_cast<const xmlChar*>(x);
     }
- 
+
     template <class T>
-    void TNode::AttrInternal(TCharPtr& value, T& res, TStringBuf errContext) const { 
+    void TNode::AttrInternal(TCharPtr& value, T& res, TStringBuf errContext) const {
         try {
             res = FromString<T>(CAST2CHAR(value.Get()));
         } catch (TFromStringException&) {
@@ -27,16 +27,16 @@ namespace NXml {
     }
 
     template <>
-    inline void TNode::AttrInternal(TCharPtr& value, TString& res, TStringBuf /*errContext*/) const { 
+    inline void TNode::AttrInternal(TCharPtr& value, TString& res, TStringBuf /*errContext*/) const {
         TString tmp(CAST2CHAR(value.Get()));
         res.swap(tmp);
     }
 
     template <class T>
-    T TNode::Attr(TZtStringBuf name) const { 
-        TCharPtr value(xmlGetProp(NodePointer, XMLCHAR(name.c_str()))); 
+    T TNode::Attr(TZtStringBuf name) const {
+        TCharPtr value(xmlGetProp(NodePointer, XMLCHAR(name.c_str())));
         if (!value) {
-            THROW(AttributeNotFound, Path() << "@" << name); 
+            THROW(AttributeNotFound, Path() << "@" << name);
         }
 
         T t;
@@ -45,8 +45,8 @@ namespace NXml {
     }
 
     template <class T>
-    T TNode::Attr(TZtStringBuf name, const T& defvalue) const { 
-        TCharPtr attr(xmlGetProp(NodePointer, XMLCHAR(name.c_str()))); 
+    T TNode::Attr(TZtStringBuf name, const T& defvalue) const {
+        TCharPtr attr(xmlGetProp(NodePointer, XMLCHAR(name.c_str())));
         if (!attr) {
             return defvalue;
         }
@@ -57,18 +57,18 @@ namespace NXml {
     }
 
     template <class T>
-    void TNode::Attr(TZtStringBuf name, T& value) const { 
-        TCharPtr attr(xmlGetProp(NodePointer, XMLCHAR(name.c_str()))); 
+    void TNode::Attr(TZtStringBuf name, T& value) const {
+        TCharPtr attr(xmlGetProp(NodePointer, XMLCHAR(name.c_str())));
         if (!attr) {
-            THROW(AttributeNotFound, Path() << name); 
+            THROW(AttributeNotFound, Path() << name);
         }
 
         AttrInternal(attr, value, name);
     }
 
     template <class T>
-    void TNode::Attr(TZtStringBuf name, T& value, const T& defvalue) const { 
-        TCharPtr attr(xmlGetProp(NodePointer, XMLCHAR(name.c_str()))); 
+    void TNode::Attr(TZtStringBuf name, T& value, const T& defvalue) const {
+        TCharPtr attr(xmlGetProp(NodePointer, XMLCHAR(name.c_str())));
 
         if (!attr) {
             value = defvalue;
@@ -80,10 +80,10 @@ namespace NXml {
     template <class T>
     T TNode::Value() const {
         if (!NodePointer || xmlIsBlankNode(NodePointer)) {
-            THROW(NodeIsBlank, Path()); 
+            THROW(NodeIsBlank, Path());
         }
 
-        TCharPtr val(xmlNodeGetContent(NodePointer)); 
+        TCharPtr val(xmlNodeGetContent(NodePointer));
         T t;
         AttrInternal(val, t, this->Name());
         return t;
@@ -95,26 +95,26 @@ namespace NXml {
             return defvalue;
         }
 
-        TCharPtr val(xmlNodeGetContent(NodePointer)); 
+        TCharPtr val(xmlNodeGetContent(NodePointer));
         T t;
         AttrInternal(val, t, this->Name());
         return t;
     }
 
     template <class T>
-    typename std::enable_if<!std::is_convertible_v<T, TStringBuf>, void>::type 
-    TNode::SetValue(const T& value) { 
+    typename std::enable_if<!std::is_convertible_v<T, TStringBuf>, void>::type
+    TNode::SetValue(const T& value) {
         TStringStream ss;
         ss << value;
-        SetValue(ss.Str()); 
-    } 
- 
-    inline void TNode::SetValue(TStringBuf value) { 
+        SetValue(ss.Str());
+    }
+
+    inline void TNode::SetValue(TStringBuf value) {
         xmlNodeSetContent(NodePointer, XMLCHAR(""));
-        xmlNodeAddContentLen(NodePointer, XMLCHAR(value.data()), value.Size()); 
+        xmlNodeAddContentLen(NodePointer, XMLCHAR(value.data()), value.Size());
     }
 
-    inline void TNode::SetAttr(TZtStringBuf name, TZtStringBuf value) { 
+    inline void TNode::SetAttr(TZtStringBuf name, TZtStringBuf value) {
         xmlAttr* attr = xmlSetProp(NodePointer, XMLCHAR(name.c_str()), XMLCHAR(value.c_str()));
 
         if (!attr) {
@@ -127,14 +127,14 @@ namespace NXml {
     }
 
     template <class T>
-    typename std::enable_if<!std::is_convertible_v<T, TZtStringBuf>, void>::type 
-    TNode::SetAttr(TZtStringBuf name, const T& value) { 
+    typename std::enable_if<!std::is_convertible_v<T, TZtStringBuf>, void>::type
+    TNode::SetAttr(TZtStringBuf name, const T& value) {
         TStringStream ss;
         ss << value;
-        SetAttr(name, TZtStringBuf(ss.Str())); 
+        SetAttr(name, TZtStringBuf(ss.Str()));
     }
 
-    inline void TNode::SetAttr(TZtStringBuf name) { 
+    inline void TNode::SetAttr(TZtStringBuf name) {
         xmlAttr* attr = xmlSetProp(NodePointer, XMLCHAR(name.c_str()), nullptr);
 
         if (!attr) {
@@ -144,7 +144,7 @@ namespace NXml {
         }
     }
 
-    inline void TNode::DelAttr(TZtStringBuf name) { 
+    inline void TNode::DelAttr(TZtStringBuf name) {
         if (xmlUnsetProp(NodePointer, XMLCHAR(name.c_str())) < 0)
             THROW(XmlException, "Can't delete node attribute <"
                                     << name
@@ -152,14 +152,14 @@ namespace NXml {
     }
 
     template <class T>
-    typename std::enable_if<!std::is_convertible_v<T, TZtStringBuf>, TNode>::type 
-    TNode::AddChild(TZtStringBuf name, const T& value) { 
+    typename std::enable_if<!std::is_convertible_v<T, TZtStringBuf>, TNode>::type
+    TNode::AddChild(TZtStringBuf name, const T& value) {
         TStringStream ss;
         ss << value;
-        return AddChild(name, TZtStringBuf(ss.Str())); 
+        return AddChild(name, TZtStringBuf(ss.Str()));
     }
 
-    inline TNode TNode::AddChild(TZtStringBuf name, TZtStringBuf value) { 
+    inline TNode TNode::AddChild(TZtStringBuf name, TZtStringBuf value) {
         if (IsNull()) {
             THROW(XmlException, "addChild [name=" << name << ", value=" << value
                                                   << "]: can't add child to null node");
@@ -179,18 +179,18 @@ namespace NXml {
                                                   << "]: xmlNewTextChild returned NULL");
         }
 
-        return TNode(DocPointer, child); 
+        return TNode(DocPointer, child);
     }
 
     template <class T>
-    typename std::enable_if<!std::is_convertible_v<T, TStringBuf>, TNode>::type 
-    TNode::AddText(const T& value) { 
+    typename std::enable_if<!std::is_convertible_v<T, TStringBuf>, TNode>::type
+    TNode::AddText(const T& value) {
         TStringStream ss;
         ss << value;
         return AddText(ss.Str());
     }
 
-    inline TNode TNode::AddText(TStringBuf value) { 
+    inline TNode TNode::AddText(TStringBuf value) {
         if (IsNull()) {
             THROW(XmlException, "addChild [value=" << value
                                                    << "]: can't add child to null node");
diff --git a/library/cpp/xml/document/xml-document-decl.h b/library/cpp/xml/document/xml-document-decl.h
index 7b900939ab..bfda1fb7e6 100644
--- a/library/cpp/xml/document/xml-document-decl.h
+++ b/library/cpp/xml/document/xml-document-decl.h
@@ -1,19 +1,19 @@
 #pragma once
 
-#include <library/cpp/string_utils/ztstrbuf/ztstrbuf.h> 
- 
+#include <library/cpp/string_utils/ztstrbuf/ztstrbuf.h>
+
 #include <util/generic/string.h>
 #include <util/generic/vector.h>
 #include <util/stream/output.h>
 #include <util/stream/str.h>
 #include <algorithm>
-#include "libxml-guards.h" 
+#include "libxml-guards.h"
 
 namespace NXml {
-    class TNode; 
+    class TNode;
 
     class TConstNodes;
-    class TConstNode; 
+    class TConstNode;
 
     using TXPathContext = xmlXPathContext;
 
@@ -24,11 +24,11 @@ namespace NXml {
             String,
             RootName,
         };
- 
+
     public:
         /**
-        * create TDocument 
-        * @param source: filename, XML string, or name for the root element (depends on @src) 
+        * create TDocument
+        * @param source: filename, XML string, or name for the root element (depends on @src)
         * @param src: source type: File | String | RootName
         * throws if file not found or cannot be parsed
         */
@@ -44,10 +44,10 @@ namespace NXml {
         /**
         * get root element
         */
-        TNode Root(); 
-        TConstNode Root() const; 
+        TNode Root();
+        TConstNode Root() const;
 
-        void Save(IOutputStream& stream, TZtStringBuf enc = "", bool shouldFormat = true) const { 
+        void Save(IOutputStream& stream, TZtStringBuf enc = "", bool shouldFormat = true) const {
             int bufferSize = 0;
             xmlChar* xmlBuff = nullptr;
             const char* encoding = enc.size() ? enc.data() : Doc->encoding ? nullptr : "UTF-8";
@@ -56,14 +56,14 @@ namespace NXml {
             stream.Write(xmlBuff, bufferSize);
         }
 
-        TString ToString(TZtStringBuf enc = "", bool shouldFormat = true) const { 
+        TString ToString(TZtStringBuf enc = "", bool shouldFormat = true) const {
             TStringStream s;
             Save(s, enc, shouldFormat);
             return s.Str();
         }
 
         void Swap(TDocument& that) {
-            std::swap(this->Doc, that.Doc); 
+            std::swap(this->Doc, that.Doc);
         }
 
         xmlDocPtr GetImpl() {
@@ -72,7 +72,7 @@ namespace NXml {
 
     private:
         void ParseFile(const TString& file);
-        void ParseString(TZtStringBuf xml); 
+        void ParseString(TZtStringBuf xml);
 
         TDocument(TDocHolder doc)
             : Doc(std::move(doc))
@@ -111,7 +111,7 @@ namespace NXml {
         * get node by id
         * @param number: node id
         */
-        TConstNode operator[](size_t number) const; 
+        TConstNode operator[](size_t number) const;
 
         /**
         * get number of nodes
@@ -123,50 +123,50 @@ namespace NXml {
             return SizeValue;
         }
 
-        struct TNodeIter { 
-            const TConstNodes& Nodes; 
-            size_t Index; 
+        struct TNodeIter {
+            const TConstNodes& Nodes;
+            size_t Index;
             TConstNode operator*() const;
             bool operator==(const TNodeIter& other) const {
-                return Index == other.Index; 
-            } 
+                return Index == other.Index;
+            }
             bool operator!=(const TNodeIter& other) const {
-                return !(*this == other); 
-            } 
-            TNodeIter operator++() { 
-                Index++; 
-                return *this; 
-            } 
-        }; 
+                return !(*this == other);
+            }
+            TNodeIter operator++() {
+                Index++;
+                return *this;
+            }
+        };
         TNodeIter begin() const {
             return TNodeIter{*this, 0};
         }
         TNodeIter end() const {
             return TNodeIter{*this, size()};
         }
- 
+
     private:
         friend class TDocument;
-        friend class TConstNode; 
-        friend class TNode; 
+        friend class TConstNode;
+        friend class TNode;
 
         TConstNodes(xmlDoc* doc, TXPathObjectPtr obj);
 
-        size_t SizeValue; 
-        xmlDoc* Doc; 
-        TXPathObjectPtr Obj; 
+        size_t SizeValue;
+        xmlDoc* Doc;
+        TXPathObjectPtr Obj;
     };
 
     class TNode {
     public:
         friend class TDocument;
-        friend class TConstNode; 
+        friend class TConstNode;
         friend class TTextReader;
 
         /**
         * check if node is null
         */
-        bool IsNull() const; 
+        bool IsNull() const;
 
         /**
         * check if node is element node
@@ -186,15 +186,15 @@ namespace NXml {
         TXPathContextPtr CreateXPathContext(const TNamespacesForXPath& nss = TNamespacesForXPath()) const;
 
         /**
-        * get all element nodes matching given xpath expression 
+        * get all element nodes matching given xpath expression
         * @param xpath: xpath expression
         * @param quiet: don't throw exception if zero nodes found
         * @param ns: explicitly specify XML namespaces to use and their prefixes
-        * 
-        * For historical reasons, this only works for *element* nodes. 
-        * Use the XPath function if you need other kinds of nodes. 
+        *
+        * For historical reasons, this only works for *element* nodes.
+        * Use the XPath function if you need other kinds of nodes.
         */
-        TConstNodes Nodes(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath()) const; 
+        TConstNodes Nodes(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath()) const;
 
         /**
         * get all element nodes matching given xpath expression
@@ -205,37 +205,37 @@ namespace NXml {
         * For historical reasons, this only works for *element* nodes.
         * Use the XPath function if you need other kinds of nodes.
         */
-        TConstNodes Nodes(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const; 
+        TConstNodes Nodes(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const;
+
+        /**
+        * get all nodes matching given xpath expression
+        * @param xpath: xpath expression
+        * @param quiet: don't throw exception if zero nodes found
+        * @param ns: explicitly specify XML namespaces to use and their prefixes
+        */
+        TConstNodes XPath(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath()) const;
 
         /**
-        * get all nodes matching given xpath expression 
-        * @param xpath: xpath expression 
-        * @param quiet: don't throw exception if zero nodes found 
-        * @param ns: explicitly specify XML namespaces to use and their prefixes 
-        */ 
-        TConstNodes XPath(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath()) const; 
- 
-        /** 
         * get all nodes matching given xpath expression
         * @param xpath: xpath expression
         * @param quiet: don't throw exception if zero nodes found
         * @param ctxt: reusable xpath context
         */
-        TConstNodes XPath(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const; 
+        TConstNodes XPath(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const;
 
         /**
-        * get the first element node matching given xpath expression 
+        * get the first element node matching given xpath expression
         * @param xpath: path to node (from current node)
         * @param quiet: don't throw exception if node not found,
         *               return null node (@see IsNull())
         * @param ns: explicitly specify XML namespaces to use and their prefixes
-        * 
-        * For historical reasons, this only works for *element* nodes. 
-        * Use the XPath function if you need other kinds of nodes. 
+        *
+        * For historical reasons, this only works for *element* nodes.
+        * Use the XPath function if you need other kinds of nodes.
         */
         /// @todo: quiet should be default, empty nodeset is not an error
-        TNode Node(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath()); 
-        TConstNode Node(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath()) const; 
+        TNode Node(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath());
+        TConstNode Node(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath()) const;
 
         /**
         * get the first element node matching given xpath expression
@@ -247,8 +247,8 @@ namespace NXml {
         * For historical reasons, this only works for *element* nodes.
         * Use the XPath function if you need other kinds of nodes.
         */
-        TNode Node(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt); 
-        TConstNode Node(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const; 
+        TNode Node(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt);
+        TConstNode Node(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const;
 
         /**
         * get node first child
@@ -256,8 +256,8 @@ namespace NXml {
         * @note if name is empty, returns the first child node of type "element"
         * @note returns null node if no child found
         */
-        TNode FirstChild(TZtStringBuf name); 
-        TConstNode FirstChild(TZtStringBuf name) const; 
+        TNode FirstChild(TZtStringBuf name);
+        TConstNode FirstChild(TZtStringBuf name) const;
 
         TNode FirstChild();
         TConstNode FirstChild() const;
@@ -275,8 +275,8 @@ namespace NXml {
         * @note if name is empty, returns the next sibling node of type "element"
         * @node returns null node if no neighbour found
         */
-        TNode NextSibling(TZtStringBuf name); 
-        TConstNode NextSibling(TZtStringBuf name) const; 
+        TNode NextSibling(TZtStringBuf name);
+        TConstNode NextSibling(TZtStringBuf name) const;
 
         TNode NextSibling();
         TConstNode NextSibling() const;
@@ -286,7 +286,7 @@ namespace NXml {
         * @param name: child name
         * returns new empty node
         */
-        TNode AddChild(TZtStringBuf name); 
+        TNode AddChild(TZtStringBuf name);
 
         /**
         * create child node with given value
@@ -294,11 +294,11 @@ namespace NXml {
         * @param value: node value
         */
         template <class T>
-        typename std::enable_if<!std::is_convertible_v<T, TZtStringBuf>, TNode>::type 
-        AddChild(TZtStringBuf name, const T& value); 
+        typename std::enable_if<!std::is_convertible_v<T, TZtStringBuf>, TNode>::type
+        AddChild(TZtStringBuf name, const T& value);
+
+        TNode AddChild(TZtStringBuf name, TZtStringBuf value);
 
-        TNode AddChild(TZtStringBuf name, TZtStringBuf value); 
- 
         /**
         * add child node, making recursive copy of original
         * @param node: node to copy from
@@ -312,18 +312,18 @@ namespace NXml {
         * @param value: node value
         */
         template <class T>
-        typename std::enable_if<!std::is_convertible_v<T, TStringBuf>, TNode>::type 
-        AddText(const T& value); 
+        typename std::enable_if<!std::is_convertible_v<T, TStringBuf>, TNode>::type
+        AddText(const T& value);
+
+        TNode AddText(TStringBuf value);
 
-        TNode AddText(TStringBuf value); 
- 
         /**
         * get node attribute
         * @param name: attribute name
         * throws exception if attribute not found
         */
         template <class T>
-        T Attr(TZtStringBuf name) const; 
+        T Attr(TZtStringBuf name) const;
 
         /**
         * get node attribute
@@ -331,7 +331,7 @@ namespace NXml {
         * returns default value if attribute not found
         */
         template <class T>
-        T Attr(TZtStringBuf name, const T& defvalue) const; 
+        T Attr(TZtStringBuf name, const T& defvalue) const;
 
         /**
         * get node attribute
@@ -340,7 +340,7 @@ namespace NXml {
         * throws exception if attribute not found
         */
         template <class T>
-        void Attr(TZtStringBuf name, T& value) const; 
+        void Attr(TZtStringBuf name, T& value) const;
 
         /**
         * get node attribute
@@ -350,14 +350,14 @@ namespace NXml {
         * returns default value if attribute not found, attr value otherwise
         */
         template <class T>
-        void Attr(TZtStringBuf name, T& value, const T& defvalue) const; 
+        void Attr(TZtStringBuf name, T& value, const T& defvalue) const;
 
         /**
         * get node value (text)
         * @throws exception if node is blank
         */
         template <class T>
-        T Value() const; 
+        T Value() const;
 
         /**
         * get node value
@@ -365,37 +365,37 @@ namespace NXml {
         * returns default value if node is blank
         */
         template <class T>
-        T Value(const T& defvalue) const; 
+        T Value(const T& defvalue) const;
 
         /**
         * set node value
         * @param value: new text value
         */
         template <class T>
-        typename std::enable_if<!std::is_convertible_v<T, TStringBuf>, void>::type 
-        SetValue(const T& value); 
+        typename std::enable_if<!std::is_convertible_v<T, TStringBuf>, void>::type
+        SetValue(const T& value);
+
+        void SetValue(TStringBuf value);
 
-        void SetValue(TStringBuf value); 
- 
         /**
         * set/reset node attribute value,
         * if attribute does not exist, it'll be created
         * @param name: attribute name
         * @param value: attribute value
         */
-        template<class T> 
-        typename std::enable_if<!std::is_convertible_v<T, TZtStringBuf>, void>::type 
-        SetAttr(TZtStringBuf name, const T& value); 
+        template<class T>
+        typename std::enable_if<!std::is_convertible_v<T, TZtStringBuf>, void>::type
+        SetAttr(TZtStringBuf name, const T& value);
+
+        void SetAttr(TZtStringBuf name, TZtStringBuf value);
 
-        void SetAttr(TZtStringBuf name, TZtStringBuf value); 
+        void SetAttr(TZtStringBuf name);
 
-        void SetAttr(TZtStringBuf name); 
- 
         /**
         * delete node attribute
         * @param name: attribute name
         */
-        void DelAttr(TZtStringBuf name); 
+        void DelAttr(TZtStringBuf name);
 
         /**
         * set node application data
@@ -421,13 +421,13 @@ namespace NXml {
         /**
         * get node xml representation
         */
-        TString ToString(TZtStringBuf enc = "") const { 
+        TString ToString(TZtStringBuf enc = "") const {
             TStringStream s;
             Save(s, enc);
             return s.Str();
         }
-        void Save(IOutputStream& stream, TZtStringBuf enc = "", bool shouldFormat = false) const; 
-        void SaveAsHtml(IOutputStream& stream, TZtStringBuf enc = "", bool shouldFormat = false) const; 
+        void Save(IOutputStream& stream, TZtStringBuf enc = "", bool shouldFormat = false) const;
+        void SaveAsHtml(IOutputStream& stream, TZtStringBuf enc = "", bool shouldFormat = false) const;
 
         /**
         * get pointer to internal node
@@ -448,7 +448,7 @@ namespace NXml {
         /**
         * constructs null node
         */
-        TNode() 
+        TNode()
             : NodePointer(nullptr)
             , DocPointer(nullptr)
         {
@@ -457,33 +457,33 @@ namespace NXml {
     private:
         friend class TConstNodes;
 
-        TNode(xmlDoc* doc, xmlNode* node) 
-            : NodePointer(node) 
-            , DocPointer(doc) 
+        TNode(xmlDoc* doc, xmlNode* node)
+            : NodePointer(node)
+            , DocPointer(doc)
         {
         }
 
-        TNode Find(xmlNode* start, TZtStringBuf name); 
+        TNode Find(xmlNode* start, TZtStringBuf name);
 
         template <class T>
-        void AttrInternal(TCharPtr& value, T& res, TStringBuf errContext) const; 
+        void AttrInternal(TCharPtr& value, T& res, TStringBuf errContext) const;
 
-        void SaveInternal(IOutputStream& stream, TZtStringBuf enc, int options) const; 
+        void SaveInternal(IOutputStream& stream, TZtStringBuf enc, int options) const;
 
-        xmlNode* NodePointer; 
-        xmlDoc* DocPointer; 
+        xmlNode* NodePointer;
+        xmlDoc* DocPointer;
     };
 
     class TConstNode {
     public:
         friend class TDocument;
         friend class TConstNodes;
-        friend class TNode; 
+        friend class TNode;
         /**
         * check if node is null
         */
         bool IsNull() const {
-            return ActualNode.IsNull(); 
+            return ActualNode.IsNull();
         }
 
         bool IsElementNode() const {
@@ -491,9 +491,9 @@ namespace NXml {
         }
 
         TConstNode Parent() const {
-            return ActualNode.Parent(); 
-        } 
- 
+            return ActualNode.Parent();
+        }
+
         /**
         * Create xpath context to be used later for fast xpath evaluation.
         * @param nss: explicitly specify XML namespaces to use and their prefixes
@@ -503,16 +503,16 @@ namespace NXml {
         }
 
         /**
-        * get all element nodes matching given xpath expression 
+        * get all element nodes matching given xpath expression
         * @param xpath: xpath expression
         * @param quiet: don't throw exception if zero nodes found
         * @param ns: explicitly specify XML namespaces to use and their prefixes
-        * 
-        * For historical reasons, this only works for *element* nodes. 
-        * Use the XPath function if you need other kinds of nodes. 
+        *
+        * For historical reasons, this only works for *element* nodes.
+        * Use the XPath function if you need other kinds of nodes.
         */
-        TConstNodes Nodes(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath()) const { 
-            return ActualNode.Nodes(xpath, quiet, ns); 
+        TConstNodes Nodes(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath()) const {
+            return ActualNode.Nodes(xpath, quiet, ns);
         }
 
         /**
@@ -524,42 +524,42 @@ namespace NXml {
         * For historical reasons, this only works for *element* nodes.
         * Use the XPath function if you need other kinds of nodes.
         */
-        TConstNodes Nodes(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const { 
+        TConstNodes Nodes(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const {
             return ActualNode.Nodes(xpath, quiet, ctxt);
         }
 
         /**
-        * get all nodes matching given xpath expression 
-        * @param xpath: xpath expression 
-        * @param quiet: don't throw exception if zero nodes found 
+        * get all nodes matching given xpath expression
+        * @param xpath: xpath expression
+        * @param quiet: don't throw exception if zero nodes found
         * @param ns: explicitly specify XML namespaces to use and their prefixes
-        */ 
-        TConstNodes XPath(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath()) const { 
-            return ActualNode.XPath(xpath, quiet, ns); 
-        } 
- 
-        /** 
+        */
+        TConstNodes XPath(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath()) const {
+            return ActualNode.XPath(xpath, quiet, ns);
+        }
+
+        /**
         * get all nodes matching given xpath expression
         * @param xpath: xpath expression
         * @param quiet: don't throw exception if zero nodes found
         * @param ctxt: reusable xpath context
         */
-        TConstNodes XPath(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const { 
+        TConstNodes XPath(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const {
             return ActualNode.XPath(xpath, quiet, ctxt);
         }
 
         /**
-        * get the first element node matching given xpath expression 
+        * get the first element node matching given xpath expression
         * @param xpath: path to node (from current node)
         * @param quiet: don't throw exception if node not found,
         *               return null node (@see IsNull())
         * @param ns: explicitly specify XML namespaces to use and their prefixes
-        * 
-        * For historical reasons, this only works for *element* nodes. 
-        * Use the XPath function if you need other kinds of nodes. 
+        *
+        * For historical reasons, this only works for *element* nodes.
+        * Use the XPath function if you need other kinds of nodes.
         */
-        TConstNode Node(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath()) const { 
-            return ActualNode.Node(xpath, quiet, ns); 
+        TConstNode Node(TZtStringBuf xpath, bool quiet = false, const TNamespacesForXPath& ns = TNamespacesForXPath()) const {
+            return ActualNode.Node(xpath, quiet, ns);
         }
 
         /**
@@ -572,12 +572,12 @@ namespace NXml {
         * For historical reasons, this only works for *element* nodes.
         * Use the XPath function if you need other kinds of nodes.
         */
-        TConstNode Node(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const { 
+        TConstNode Node(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const {
             return ActualNode.Node(xpath, quiet, ctxt);
         }
 
-        TConstNode FirstChild(TZtStringBuf name) const { 
-            return ActualNode.FirstChild(name); 
+        TConstNode FirstChild(TZtStringBuf name) const {
+            return ActualNode.FirstChild(name);
         }
 
         TConstNode FirstChild() const {
@@ -589,8 +589,8 @@ namespace NXml {
         * @param name: neighbour name
         * throws exception if no neighbour found
         */
-        TConstNode NextSibling(TZtStringBuf name) const { 
-            return ActualNode.NextSibling(name); 
+        TConstNode NextSibling(TZtStringBuf name) const {
+            return ActualNode.NextSibling(name);
         }
 
         TConstNode NextSibling() const {
@@ -603,8 +603,8 @@ namespace NXml {
         * throws exception if attribute not found
         */
         template <class T>
-        T Attr(TZtStringBuf name) const { 
-            return ActualNode.Attr<T>(name); 
+        T Attr(TZtStringBuf name) const {
+            return ActualNode.Attr<T>(name);
         }
 
         /**
@@ -613,8 +613,8 @@ namespace NXml {
         * returns default value if attribute not found
         */
         template <class T>
-        T Attr(TZtStringBuf name, const T& defvalue) const { 
-            return ActualNode.Attr(name, defvalue); 
+        T Attr(TZtStringBuf name, const T& defvalue) const {
+            return ActualNode.Attr(name, defvalue);
         }
 
         /**
@@ -624,8 +624,8 @@ namespace NXml {
         * throws exception if attribute not found
         */
         template <class T>
-        void Attr(TZtStringBuf name, T& value) const { 
-            return ActualNode.Attr(name, value); 
+        void Attr(TZtStringBuf name, T& value) const {
+            return ActualNode.Attr(name, value);
         }
 
         /**
@@ -636,8 +636,8 @@ namespace NXml {
         * returns default value if attribute not found, attr value otherwise
         */
         template <class T>
-        void Attr(TZtStringBuf name, T& value, const T& defvalue) const { 
-            return ActualNode.Attr(name, value, defvalue); 
+        void Attr(TZtStringBuf name, T& value, const T& defvalue) const {
+            return ActualNode.Attr(name, value, defvalue);
         }
 
         /**
@@ -646,7 +646,7 @@ namespace NXml {
         */
         template <class T>
         T Value() const {
-            return ActualNode.Value<T>(); 
+            return ActualNode.Value<T>();
         }
 
         /**
@@ -656,7 +656,7 @@ namespace NXml {
         */
         template <class T>
         T Value(const T& defvalue) const {
-            return ActualNode.Value(defvalue); 
+            return ActualNode.Value(defvalue);
         }
 
         /**
@@ -691,28 +691,28 @@ namespace NXml {
         * get node xpath
         */
         TString Path() const {
-            return ActualNode.Path(); 
+            return ActualNode.Path();
         }
 
         /**
         * get node xml representation
         */
-        TString ToString(TZtStringBuf enc = "") const { 
+        TString ToString(TZtStringBuf enc = "") const {
             return ActualNode.ToString(enc);
         }
 
         TConstNode() = default;
-        TConstNode(TNode node) 
-            : ActualNode(node) 
+        TConstNode(TNode node)
+            : ActualNode(node)
         {
         }
 
         TNode ConstCast() const {
-            return ActualNode; 
-        } 
- 
+            return ActualNode;
+        }
+
     private:
-        TNode ActualNode; 
+        TNode ActualNode;
     };
 
 }
diff --git a/library/cpp/xml/document/xml-document.cpp b/library/cpp/xml/document/xml-document.cpp
index 23c16cf495..18a554d732 100644
--- a/library/cpp/xml/document/xml-document.cpp
+++ b/library/cpp/xml/document/xml-document.cpp
@@ -75,7 +75,7 @@ namespace NXml {
         Doc = std::move(doc);
     }
 
-    void TDocument::ParseString(TZtStringBuf xml) { 
+    void TDocument::ParseString(TZtStringBuf xml) {
         TParserCtxtPtr pctx(xmlNewParserCtxt());
         if (pctx.Get() == nullptr)
             THROW(XmlException, "Can't create parser context");
@@ -89,19 +89,19 @@ namespace NXml {
     }
 
     TNode TDocument::Root() {
-        xmlNode* r = xmlDocGetRootElement(Doc.Get()); 
+        xmlNode* r = xmlDocGetRootElement(Doc.Get());
         if (r == nullptr)
             THROW(XmlException, "TDocument hasn't root element");
 
-        return TNode(Doc.Get(), r); 
+        return TNode(Doc.Get(), r);
     }
 
     TConstNode TDocument::Root() const {
-        xmlNode* r = xmlDocGetRootElement(Doc.Get()); 
+        xmlNode* r = xmlDocGetRootElement(Doc.Get());
         if (r == nullptr)
             THROW(XmlException, "TDocument hasn't root element");
 
-        return TConstNode(TNode(Doc.Get(), r)); 
+        return TConstNode(TNode(Doc.Get(), r));
     }
 
     bool TNode::IsNull() const {
@@ -126,12 +126,12 @@ namespace NXml {
         return ctx;
     }
 
-    TConstNodes TNode::XPath(TZtStringBuf xpath, bool quiet, const TNamespacesForXPath& ns) const { 
+    TConstNodes TNode::XPath(TZtStringBuf xpath, bool quiet, const TNamespacesForXPath& ns) const {
         TXPathContextPtr ctxt = CreateXPathContext(ns);
         return XPath(xpath, quiet, *ctxt);
     }
 
-    TConstNodes TNode::XPath(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const { 
+    TConstNodes TNode::XPath(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const {
         if (xmlXPathSetContextNode(NodePointer, &ctxt) != 0)
             THROW(XmlException, "Can't set xpath context node, probably the context is associated with another document");
 
@@ -141,59 +141,59 @@ namespace NXml {
 
         TConstNodes nodes(DocPointer, obj);
 
-        if (nodes.Size() == 0 && !quiet) 
+        if (nodes.Size() == 0 && !quiet)
             THROW(NodeNotFound, xpath);
 
         return nodes;
     }
 
-    TConstNodes TNode::Nodes(TZtStringBuf xpath, bool quiet, const TNamespacesForXPath& ns) const { 
+    TConstNodes TNode::Nodes(TZtStringBuf xpath, bool quiet, const TNamespacesForXPath& ns) const {
         TXPathContextPtr ctxt = CreateXPathContext(ns);
         return Nodes(xpath, quiet, *ctxt);
     }
 
-    TConstNodes TNode::Nodes(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const { 
+    TConstNodes TNode::Nodes(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const {
         TConstNodes nodes = XPath(xpath, quiet, ctxt);
-        if (nodes.Size() != 0 && !nodes[0].IsElementNode()) 
-            THROW(XmlException, "xpath points to non-element nodes: " << xpath); 
-        return nodes; 
-    } 
+        if (nodes.Size() != 0 && !nodes[0].IsElementNode())
+            THROW(XmlException, "xpath points to non-element nodes: " << xpath);
+        return nodes;
+    }
 
-    TNode TNode::Node(TZtStringBuf xpath, bool quiet, const TNamespacesForXPath& ns) { 
+    TNode TNode::Node(TZtStringBuf xpath, bool quiet, const TNamespacesForXPath& ns) {
         TXPathContextPtr ctxt = CreateXPathContext(ns);
         return Node(xpath, quiet, *ctxt);
     }
 
-    TConstNode TNode::Node(TZtStringBuf xpath, bool quiet, const TNamespacesForXPath& ns) const { 
+    TConstNode TNode::Node(TZtStringBuf xpath, bool quiet, const TNamespacesForXPath& ns) const {
         TXPathContextPtr ctxt = CreateXPathContext(ns);
         return Node(xpath, quiet, *ctxt);
     }
 
-    TNode TNode::Node(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) { 
+    TNode TNode::Node(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) {
         TConstNodes n = Nodes(xpath, quiet, ctxt);
 
-        if (n.Size() == 0 && !quiet) 
+        if (n.Size() == 0 && !quiet)
             THROW(NodeNotFound, xpath);
 
-        if (n.Size() == 0) 
-            return TNode(); 
+        if (n.Size() == 0)
+            return TNode();
         else
             return n[0].ConstCast();
     }
 
-    TConstNode TNode::Node(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const { 
+    TConstNode TNode::Node(TZtStringBuf xpath, bool quiet, TXPathContext& ctxt) const {
         return const_cast<TNode*>(this)->Node(xpath, quiet, ctxt);
     }
 
-    TNode TNode::FirstChild(TZtStringBuf name) { 
-        if (IsNull()) 
+    TNode TNode::FirstChild(TZtStringBuf name) {
+        if (IsNull())
             THROW(XmlException, "Node is null");
 
-        return Find(NodePointer->children, name); 
+        return Find(NodePointer->children, name);
     }
 
-    TConstNode TNode::FirstChild(TZtStringBuf name) const { 
-        return const_cast<TNode*>(this)->FirstChild(name); 
+    TConstNode TNode::FirstChild(TZtStringBuf name) const {
+        return const_cast<TNode*>(this)->FirstChild(name);
     }
 
     TNode TNode::FirstChild() {
@@ -218,15 +218,15 @@ namespace NXml {
         return const_cast<TNode*>(this)->Parent();
     }
 
-    TNode TNode::NextSibling(TZtStringBuf name) { 
-        if (IsNull()) 
+    TNode TNode::NextSibling(TZtStringBuf name) {
+        if (IsNull())
             THROW(XmlException, "Node is null");
 
-        return Find(NodePointer->next, name); 
+        return Find(NodePointer->next, name);
     }
 
-    TConstNode TNode::NextSibling(TZtStringBuf name) const { 
-        return const_cast<TNode*>(this)->NextSibling(name); 
+    TConstNode TNode::NextSibling(TZtStringBuf name) const {
+        return const_cast<TNode*>(this)->NextSibling(name);
     }
 
     TNode TNode::NextSibling() {
@@ -242,7 +242,7 @@ namespace NXml {
 
     /* NOTE: by default child will inherit it's parent ns */
 
-    TNode TNode::AddChild(TZtStringBuf name) { 
+    TNode TNode::AddChild(TZtStringBuf name) {
         return AddChild(name, "");
     }
 
@@ -262,12 +262,12 @@ namespace NXml {
         return NodePointer->_private;
     }
 
-    TNode TNode::Find(xmlNode* start, TZtStringBuf name) { 
+    TNode TNode::Find(xmlNode* start, TZtStringBuf name) {
         for (; start; start = start->next)
             if (start->type == XML_ELEMENT_NODE && (name.empty() || !xmlStrcmp(start->name, XMLCHAR(name.c_str()))))
-                return TNode(DocPointer, start); 
+                return TNode(DocPointer, start);
 
-        return TNode(); 
+        return TNode();
     }
 
     TString TNode::Name() const {
@@ -278,7 +278,7 @@ namespace NXml {
     }
 
     TString TNode::Path() const {
-        TCharPtr path(xmlGetNodePath(NodePointer)); 
+        TCharPtr path(xmlGetNodePath(NodePointer));
         if (!!path)
             return CAST2CHAR(path.Get());
         else
@@ -313,7 +313,7 @@ namespace NXml {
         return len;
     }
 
-    void TNode::SaveInternal(IOutputStream& stream, TZtStringBuf enc, int options) const { 
+    void TNode::SaveInternal(IOutputStream& stream, TZtStringBuf enc, int options) const {
         const char* encoding = enc.size() ? enc.data() : "utf-8";
         TSaveCtxtPtr ctx(xmlSaveToIO(XmlWriteToOstream, /* close */ nullptr, &stream,
                                      encoding, options));
@@ -321,45 +321,45 @@ namespace NXml {
             THROW(XmlException, "Failed saving node to stream");
     }
 
-    void TNode::Save(IOutputStream& stream, TZtStringBuf enc, bool shouldFormat) const { 
+    void TNode::Save(IOutputStream& stream, TZtStringBuf enc, bool shouldFormat) const {
         SaveInternal(stream, enc, shouldFormat ? XML_SAVE_FORMAT : 0);
     }
 
-    void TNode::SaveAsHtml(IOutputStream& stream, TZtStringBuf enc, bool shouldFormat) const { 
+    void TNode::SaveAsHtml(IOutputStream& stream, TZtStringBuf enc, bool shouldFormat) const {
         int options = XML_SAVE_AS_HTML;
         options |= shouldFormat ? XML_SAVE_FORMAT : 0;
         SaveInternal(stream, enc, options);
     }
 
     TConstNodes::TConstNodes(const TConstNodes& nodes)
-        : SizeValue(nodes.Size()) 
-        , Doc(nodes.Doc) 
-        , Obj(nodes.Obj) 
+        : SizeValue(nodes.Size())
+        , Doc(nodes.Doc)
+        , Obj(nodes.Obj)
     {
     }
 
     TConstNodes& TConstNodes::operator=(const TConstNodes& nodes) {
         if (this != &nodes) {
-            SizeValue = nodes.Size(); 
-            Doc = nodes.Doc; 
-            Obj = nodes.Obj; 
+            SizeValue = nodes.Size();
+            Doc = nodes.Doc;
+            Obj = nodes.Obj;
         }
 
         return *this;
     }
 
     TConstNodes::TConstNodes(TConstNodesRef ref)
-        : SizeValue(ref.r_.Size()) 
-        , Doc(ref.r_.Doc) 
-        , Obj(ref.r_.Obj) 
+        : SizeValue(ref.r_.Size())
+        , Doc(ref.r_.Doc)
+        , Obj(ref.r_.Obj)
     {
     }
 
     TConstNodes& TConstNodes::operator=(TConstNodesRef ref) {
         if (this != &ref.r_) {
-            SizeValue = ref.r_.Size(); 
-            Doc = ref.r_.Doc; 
-            Obj = ref.r_.Obj; 
+            SizeValue = ref.r_.Size();
+            Doc = ref.r_.Doc;
+            Obj = ref.r_.Obj;
         }
         return *this;
     }
@@ -376,18 +376,18 @@ namespace NXml {
     }
 
     TConstNode TConstNodes::operator[](size_t number) const {
-        if (number + 1 > Size()) 
+        if (number + 1 > Size())
             THROW(XmlException, "index out of range " << number);
 
-        if (!Obj || !Obj->nodesetval) 
-            THROW(XmlException, "Broken TConstNodes object, Obj is null"); 
+        if (!Obj || !Obj->nodesetval)
+            THROW(XmlException, "Broken TConstNodes object, Obj is null");
 
-        xmlNode* node = Obj->nodesetval->nodeTab[number]; 
-        return TNode(Doc, node); 
+        xmlNode* node = Obj->nodesetval->nodeTab[number];
+        return TNode(Doc, node);
     }
 
     TConstNode TConstNodes::TNodeIter::operator*() const {
-        return Nodes[Index]; 
-    } 
- 
+        return Nodes[Index];
+    }
+
 }
diff --git a/library/cpp/xml/document/xml-document.h b/library/cpp/xml/document/xml-document.h
index 728f76761f..829ba09cc4 100644
--- a/library/cpp/xml/document/xml-document.h
+++ b/library/cpp/xml/document/xml-document.h
@@ -1,4 +1,4 @@
 #pragma once
 
-#include "xml-document-decl.h" 
-#include "node-attr.h" 
+#include "xml-document-decl.h"
+#include "node-attr.h"
diff --git a/library/cpp/xml/document/xml-document_ut.cpp b/library/cpp/xml/document/xml-document_ut.cpp
index a8cfb45117..9f537b75c4 100644
--- a/library/cpp/xml/document/xml-document_ut.cpp
+++ b/library/cpp/xml/document/xml-document_ut.cpp
@@ -1,8 +1,8 @@
 #include <library/cpp/testing/unittest/registar.h>
 #include <util/generic/map.h>
- 
-#include "xml-document.h" 
- 
+
+#include "xml-document.h"
+
 Y_UNIT_TEST_SUITE(TestXmlDocument) {
     Y_UNIT_TEST(Iteration) {
         NXml::TDocument xml(
@@ -19,40 +19,40 @@ Y_UNIT_TEST_SUITE(TestXmlDocument) {
     }
 
     Y_UNIT_TEST(ParseString) {
-        NXml::TDocument xml( 
+        NXml::TDocument xml(
             "<?xml version=\"1.0\"?>\n"
             "<root>\n"
             "<a><b len=\"15\" correct=\"1\">hello world</b></a>\n"
             "<text>Некоторый текст</text>\n"
             "</root>",
             NXml::TDocument::String);
- 
-        NXml::TConstNode root = xml.Root(); 
-        NXml::TConstNode b = root.Node("a/b"); 
-        UNIT_ASSERT_EQUAL(b.Attr<int>("len"), 15); 
-        UNIT_ASSERT_EQUAL(b.Attr<bool>("correct"), true); 
- 
-        NXml::TConstNode text = root.Node("text"); 
+
+        NXml::TConstNode root = xml.Root();
+        NXml::TConstNode b = root.Node("a/b");
+        UNIT_ASSERT_EQUAL(b.Attr<int>("len"), 15);
+        UNIT_ASSERT_EQUAL(b.Attr<bool>("correct"), true);
+
+        NXml::TConstNode text = root.Node("text");
         UNIT_ASSERT_EQUAL(text.Value<TString>(), "Некоторый текст");
-    } 
+    }
     Y_UNIT_TEST(SerializeString) {
-        NXml::TDocument xml("frob", NXml::TDocument::RootName); 
-        xml.Root().SetAttr("xyzzy", "Frobozz"); 
-        xml.Root().SetAttr("kulness", 0.3); 
-        xml.Root().SetAttr("timelimit", 3); 
- 
-        NXml::TNode authors = xml.Root().AddChild("authors"); 
-        authors.AddChild("graham").SetAttr("name", "Nelson"); 
-        authors.AddChild("zarf").SetValue("Andrew Plotkin"); 
-        authors.AddChild("emshort", "Emily Short"); 
- 
+        NXml::TDocument xml("frob", NXml::TDocument::RootName);
+        xml.Root().SetAttr("xyzzy", "Frobozz");
+        xml.Root().SetAttr("kulness", 0.3);
+        xml.Root().SetAttr("timelimit", 3);
+
+        NXml::TNode authors = xml.Root().AddChild("authors");
+        authors.AddChild("graham").SetAttr("name", "Nelson");
+        authors.AddChild("zarf").SetValue("Andrew Plotkin");
+        authors.AddChild("emshort", "Emily Short");
+
         TString data = xml.ToString("utf-8");
-        UNIT_ASSERT_EQUAL(data, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" 
-                                "<frob xyzzy=\"Frobozz\" kulness=\"0.3\" timelimit=\"3\">\n" 
+        UNIT_ASSERT_EQUAL(data, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
+                                "<frob xyzzy=\"Frobozz\" kulness=\"0.3\" timelimit=\"3\">\n"
                                 "  <authors>\n"
                                 "    <graham name=\"Nelson\"/>\n"
                                 "    <zarf>Andrew Plotkin</zarf>\n"
-                                "    <emshort>Emily Short</emshort>\n" 
+                                "    <emshort>Emily Short</emshort>\n"
                                 "  </authors>\n"
                                 "</frob>\n");
         // check default utf8 output with ru
@@ -62,7 +62,7 @@ Y_UNIT_TEST_SUITE(TestXmlDocument) {
             UNIT_ASSERT_VALUES_EQUAL(xml2.ToString(), "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
                                                       "<frob xyzzy=\"привет =)\"/>\n");
         }
-    } 
+    }
     Y_UNIT_TEST(XPathNs) {
         using namespace NXml;
         TDocument xml(
@@ -114,11 +114,11 @@ Y_UNIT_TEST_SUITE(TestXmlDocument) {
         UNIT_ASSERT_EQUAL(node.Value<TString>(), "");
         node = node.NextSibling();
         UNIT_ASSERT_EQUAL(node.IsNull(), true);
-        TStringStream iterLog; 
+        TStringStream iterLog;
         for (const auto& node2 : root.Nodes("/root/*")) {
             iterLog << node2.Name() << ';';
-        } 
-        UNIT_ASSERT_STRINGS_EQUAL(iterLog.Str(), "a;c;"); 
+        }
+        UNIT_ASSERT_STRINGS_EQUAL(iterLog.Str(), "a;c;");
 
         // get only element nodes, ignore text nodes with empty "name" param
         node = root.FirstChild(TString());
@@ -152,29 +152,29 @@ Y_UNIT_TEST_SUITE(TestXmlDocument) {
         UNIT_ASSERT_EXCEPTION(node.IsText(), yexception);
     }
     Y_UNIT_TEST(DefVal) {
-        using namespace NXml; 
-        TDocument xml("<?xml version=\"1.0\"?>\n" 
+        using namespace NXml;
+        TDocument xml("<?xml version=\"1.0\"?>\n"
                       "<root><a></a></root>",
                       NXml::TDocument::String);
-        UNIT_ASSERT_EQUAL(xml.Root().Node("a", true).Node("b", true).Value<int>(3), 3); 
-    } 
+        UNIT_ASSERT_EQUAL(xml.Root().Node("a", true).Node("b", true).Value<int>(3), 3);
+    }
     Y_UNIT_TEST(NodesVsXPath) {
-        using namespace NXml; 
-        TDocument xml("<?xml version=\"1.0\"?>\n" 
+        using namespace NXml;
+        TDocument xml("<?xml version=\"1.0\"?>\n"
                       "<root><a x=\"y\"></a></root>",
                       NXml::TDocument::String);
-        UNIT_ASSERT_EXCEPTION(xml.Root().Nodes("/root/a/@x"), yexception); 
-        UNIT_ASSERT_VALUES_EQUAL(xml.Root().XPath("/root/a/@x").Size(), 1); 
-    } 
+        UNIT_ASSERT_EXCEPTION(xml.Root().Nodes("/root/a/@x"), yexception);
+        UNIT_ASSERT_VALUES_EQUAL(xml.Root().XPath("/root/a/@x").Size(), 1);
+    }
     Y_UNIT_TEST(NodeIsFirst) {
-        using namespace NXml; 
-        TDocument xml("<?xml version=\"1.0\"?>\n" 
-                      "<root><a x=\"y\">first</a>" 
+        using namespace NXml;
+        TDocument xml("<?xml version=\"1.0\"?>\n"
+                      "<root><a x=\"y\">first</a>"
                       "<a>second</a></root>",
                       NXml::TDocument::String);
-        UNIT_ASSERT_EXCEPTION(xml.Root().Node("/root/a/@x"), yexception); 
+        UNIT_ASSERT_EXCEPTION(xml.Root().Node("/root/a/@x"), yexception);
         UNIT_ASSERT_STRINGS_EQUAL(xml.Root().Node("/root/a").Value<TString>(), "first");
-    } 
+    }
     Y_UNIT_TEST(CopyNode) {
         using namespace NXml;
         // default-construct empty node
@@ -304,16 +304,16 @@ Y_UNIT_TEST_SUITE(TestXmlDocument) {
         UNIT_ASSERT_EXCEPTION(xml1.Root(), yexception);
         UNIT_ASSERT_VALUES_EQUAL(xml2.Root().ToString(), "<foo><bar/></foo>");
     }
- 
-    Y_UNIT_TEST(StringConversion) { 
-        using namespace NXml; 
-        TDocument xml("foo", TDocument::RootName); 
-        auto root = xml.Root(); 
-        const TStringBuf stringBuf = "bar"; 
-        root.SetAttr("bar", stringBuf); 
-        const TString tString = "baz"; 
-        root.SetAttr("baz", tString); 
-        root.SetAttr("quux", "literal"); 
-        root.SetAttr("frob", 500); 
-    } 
-} 
+
+    Y_UNIT_TEST(StringConversion) {
+        using namespace NXml;
+        TDocument xml("foo", TDocument::RootName);
+        auto root = xml.Root();
+        const TStringBuf stringBuf = "bar";
+        root.SetAttr("bar", stringBuf);
+        const TString tString = "baz";
+        root.SetAttr("baz", tString);
+        root.SetAttr("quux", "literal");
+        root.SetAttr("frob", 500);
+    }
+}
diff --git a/library/cpp/xml/document/xml-textreader.cpp b/library/cpp/xml/document/xml-textreader.cpp
index ab5c0436f3..b946f1fbf2 100644
--- a/library/cpp/xml/document/xml-textreader.cpp
+++ b/library/cpp/xml/document/xml-textreader.cpp
@@ -113,15 +113,15 @@ namespace NXml {
         return TempStringResult(xmlTextReaderGetAttributeNo(Impl.Get(), number));
     }
 
-    TString TTextReader::GetAttribute(TZtStringBuf name) const { 
+    TString TTextReader::GetAttribute(TZtStringBuf name) const {
         return TempStringResult(xmlTextReaderGetAttribute(Impl.Get(), XMLCHAR(name.data())));
     }
 
-    TString TTextReader::GetAttribute(TZtStringBuf localName, TZtStringBuf nsUri) const { 
+    TString TTextReader::GetAttribute(TZtStringBuf localName, TZtStringBuf nsUri) const {
         return TempStringResult(xmlTextReaderGetAttributeNs(Impl.Get(), XMLCHAR(localName.data()), XMLCHAR(nsUri.data())));
     }
 
-    TString TTextReader::LookupNamespace(TZtStringBuf prefix) const { 
+    TString TTextReader::LookupNamespace(TZtStringBuf prefix) const {
         return TempStringResult(xmlTextReaderLookupNamespace(Impl.Get(), XMLCHAR(prefix.data())));
     }
 
@@ -129,11 +129,11 @@ namespace NXml {
         return BoolResult(xmlTextReaderMoveToAttributeNo(Impl.Get(), number));
     }
 
-    bool TTextReader::MoveToAttribute(TZtStringBuf name) { 
+    bool TTextReader::MoveToAttribute(TZtStringBuf name) {
         return BoolResult(xmlTextReaderMoveToAttribute(Impl.Get(), XMLCHAR(name.data())));
     }
 
-    bool TTextReader::MoveToAttribute(TZtStringBuf localName, TZtStringBuf nsUri) { 
+    bool TTextReader::MoveToAttribute(TZtStringBuf localName, TZtStringBuf nsUri) {
         return BoolResult(xmlTextReaderMoveToAttributeNs(Impl.Get(), XMLCHAR(localName.data()), XMLCHAR(nsUri.data())));
     }
 
diff --git a/library/cpp/xml/document/xml-textreader.h b/library/cpp/xml/document/xml-textreader.h
index 1507bfe22c..ab4c329d26 100644
--- a/library/cpp/xml/document/xml-textreader.h
+++ b/library/cpp/xml/document/xml-textreader.h
@@ -5,8 +5,8 @@
 
 #include <contrib/libs/libxml/include/libxml/xmlreader.h>
 
-#include <library/cpp/string_utils/ztstrbuf/ztstrbuf.h> 
- 
+#include <library/cpp/string_utils/ztstrbuf/ztstrbuf.h>
+
 #include <util/generic/noncopyable.h>
 #include <util/generic/ptr.h>
 #include <util/generic/strbuf.h>
@@ -222,21 +222,21 @@ namespace NXml {
          * Provides the value of the attribute with the specified qualified name.
          * @param name the qualified name of the attribute
          */
-        TString GetAttribute(TZtStringBuf name) const; 
+        TString GetAttribute(TZtStringBuf name) const;
 
         /**
          * Provides the value of the specified attribute.
          * @param localName the local name of the attribute
          * @param nsUri the namespace URI of the attribute
          */
-        TString GetAttribute(TZtStringBuf localName, TZtStringBuf nsUri) const; 
+        TString GetAttribute(TZtStringBuf localName, TZtStringBuf nsUri) const;
 
         /**
          * Resolves a namespace prefix in the scope of the current element.
          * @param prefix the prefix whose namespace URI is to be resolved. To return the default namespace, specify empty string.
          * @return a string containing the namespace URI to which the prefix maps.
          */
-        TString LookupNamespace(TZtStringBuf prefix) const; 
+        TString LookupNamespace(TZtStringBuf prefix) const;
 
         /**
          * Moves the position of the current instance to the attribute with the specified index relative to the containing element.
@@ -250,7 +250,7 @@ namespace NXml {
          * @param name the qualified name of the attribute
          * @return true in case of success, false if not found
          */
-        bool MoveToAttribute(TZtStringBuf name); 
+        bool MoveToAttribute(TZtStringBuf name);
 
         /**
          * Moves the position of the current instance to the attribute with the specified local name and namespace URI.
@@ -258,7 +258,7 @@ namespace NXml {
          * @param nsUri the namespace URI of the attribute
          * @return true in case of success, false if not found
          */
-        bool MoveToAttribute(TZtStringBuf localName, TZtStringBuf nsUri); 
+        bool MoveToAttribute(TZtStringBuf localName, TZtStringBuf nsUri);
 
         /**
          * Moves the position of the current instance to the first attribute associated with the current node.
diff --git a/library/cpp/xml/document/ya.make b/library/cpp/xml/document/ya.make
index c66f368d28..86bbd639cf 100644
--- a/library/cpp/xml/document/ya.make
+++ b/library/cpp/xml/document/ya.make
@@ -11,7 +11,7 @@ SRCS(
 PEERDIR(
     library/cpp/xml/init
     contrib/libs/libxml
-    library/cpp/string_utils/ztstrbuf 
+    library/cpp/string_utils/ztstrbuf
 )
 
 END()
diff --git a/library/cpp/xml/init/ptr.h b/library/cpp/xml/init/ptr.h
index bbc7ed9404..7387c7cc40 100644
--- a/library/cpp/xml/init/ptr.h
+++ b/library/cpp/xml/init/ptr.h
@@ -6,7 +6,7 @@
 #include <libxml/xpath.h>
 #include <libxml/xpathInternals.h>
 #include <libxml/xmlsave.h>
-#include <libxml/uri.h> 
+#include <libxml/uri.h>
 #include <libxml/xmlschemas.h>
 
 template <class T, void (*DestroyFun)(T*)>
diff --git a/library/python/ya.make b/library/python/ya.make
index c7870aae5b..2e1eb6e0e1 100644
--- a/library/python/ya.make
+++ b/library/python/ya.make
@@ -203,7 +203,7 @@ RECURSE(
     vault_client
     watch_dog
     watch_dog/example
-    wiki 
+    wiki
     windows
     windows/ut
     yandex_tracker_client