Restoring authorship annotation for <floatdrop@yandex-team.ru>. Commit 1 of 2.

1 files changed, 1164 insertions, 1164 deletions

diff --git a/contrib/python/Jinja2/py2/jinja2/compiler.py b/contrib/python/Jinja2/py2/jinja2/compiler.py
index 63297b42c30..6bec80c9ced 100644
--- a/contrib/python/Jinja2/py2/jinja2/compiler.py
+++ b/contrib/python/Jinja2/py2/jinja2/compiler.py
@@ -1,13 +1,13 @@
-# -*- coding: utf-8 -*-
+# -*- coding: utf-8 -*- 
 """Compiles nodes from the parser into Python code."""
 from collections import namedtuple
 from functools import update_wrapper
-from itertools import chain
-from keyword import iskeyword as is_python_keyword
-
+from itertools import chain 
+from keyword import iskeyword as is_python_keyword 
+ 
 from markupsafe import escape
 from markupsafe import Markup
-
+ 
 from . import nodes
 from ._compat import imap
 from ._compat import iteritems
@@ -27,7 +27,7 @@ from .optimizer import Optimizer
 from .utils import concat
 from .visitor import NodeVisitor
 
-operators = {
+operators = { 
     "eq": "==",
     "ne": "!=",
     "gt": ">",
@@ -36,559 +36,559 @@ operators = {
     "lteq": "<=",
     "in": "in",
     "notin": "not in",
-}
-
-# what method to iterate over items do we want to use for dict iteration
-# in generated code?  on 2.x let's go with iteritems, on 3.x with items
+} 
+ 
+# what method to iterate over items do we want to use for dict iteration 
+# in generated code?  on 2.x let's go with iteritems, on 3.x with items 
 if hasattr(dict, "iteritems"):
     dict_item_iter = "iteritems"
-else:
+else: 
     dict_item_iter = "items"
-
+ 
 code_features = ["division"]
-
-# does this python version support generator stops? (PEP 0479)
-try:
+ 
+# does this python version support generator stops? (PEP 0479) 
+try: 
     exec("from __future__ import generator_stop")
     code_features.append("generator_stop")
-except SyntaxError:
-    pass
-
-# does this python version support yield from?
-try:
+except SyntaxError: 
+    pass 
+ 
+# does this python version support yield from? 
+try: 
     exec("def f(): yield from x()")
-except SyntaxError:
-    supports_yield_from = False
-else:
-    supports_yield_from = True
-
-
-def optimizeconst(f):
-    def new_func(self, node, frame, **kwargs):
-        # Only optimize if the frame is not volatile
-        if self.optimized and not frame.eval_ctx.volatile:
-            new_node = self.optimizer.visit(node, frame.eval_ctx)
-            if new_node != node:
-                return self.visit(new_node, frame)
-        return f(self, node, frame, **kwargs)
-
-    return update_wrapper(new_func, f)
-
-
+except SyntaxError: 
+    supports_yield_from = False 
+else: 
+    supports_yield_from = True 
+ 
+ 
+def optimizeconst(f): 
+    def new_func(self, node, frame, **kwargs): 
+        # Only optimize if the frame is not volatile 
+        if self.optimized and not frame.eval_ctx.volatile: 
+            new_node = self.optimizer.visit(node, frame.eval_ctx) 
+            if new_node != node: 
+                return self.visit(new_node, frame) 
+        return f(self, node, frame, **kwargs) 
+
+    return update_wrapper(new_func, f) 
+ 
+ 
 def generate(
     node, environment, name, filename, stream=None, defer_init=False, optimized=True
 ):
-    """Generate the python source for a node tree."""
-    if not isinstance(node, nodes.Template):
+    """Generate the python source for a node tree.""" 
+    if not isinstance(node, nodes.Template): 
         raise TypeError("Can't compile non template nodes")
     generator = environment.code_generator_class(
         environment, name, filename, stream, defer_init, optimized
     )
-    generator.visit(node)
-    if stream is None:
-        return generator.stream.getvalue()
-
-
-def has_safe_repr(value):
-    """Does the node have a safe representation?"""
-    if value is None or value is NotImplemented or value is Ellipsis:
-        return True
-    if type(value) in (bool, int, float, complex, range_type, Markup) + string_types:
-        return True
-    if type(value) in (tuple, list, set, frozenset):
-        for item in value:
-            if not has_safe_repr(item):
-                return False
-        return True
-    elif type(value) is dict:
-        for key, value in iteritems(value):
-            if not has_safe_repr(key):
-                return False
-            if not has_safe_repr(value):
-                return False
-        return True
-    return False
-
-
-def find_undeclared(nodes, names):
-    """Check if the names passed are accessed undeclared.  The return value
-    is a set of all the undeclared names from the sequence of names found.
-    """
-    visitor = UndeclaredNameVisitor(names)
-    try:
-        for node in nodes:
-            visitor.visit(node)
-    except VisitorExit:
-        pass
-    return visitor.undeclared
-
-
-class MacroRef(object):
-    def __init__(self, node):
-        self.node = node
-        self.accesses_caller = False
-        self.accesses_kwargs = False
-        self.accesses_varargs = False
-
-
-class Frame(object):
-    """Holds compile time information for us."""
-
-    def __init__(self, eval_ctx, parent=None, level=None):
-        self.eval_ctx = eval_ctx
+    generator.visit(node) 
+    if stream is None: 
+        return generator.stream.getvalue() 
+ 
+ 
+def has_safe_repr(value): 
+    """Does the node have a safe representation?""" 
+    if value is None or value is NotImplemented or value is Ellipsis: 
+        return True 
+    if type(value) in (bool, int, float, complex, range_type, Markup) + string_types: 
+        return True 
+    if type(value) in (tuple, list, set, frozenset): 
+        for item in value: 
+            if not has_safe_repr(item): 
+                return False 
+        return True 
+    elif type(value) is dict: 
+        for key, value in iteritems(value): 
+            if not has_safe_repr(key): 
+                return False 
+            if not has_safe_repr(value): 
+                return False 
+        return True 
+    return False 
+ 
+ 
+def find_undeclared(nodes, names): 
+    """Check if the names passed are accessed undeclared.  The return value 
+    is a set of all the undeclared names from the sequence of names found. 
+    """ 
+    visitor = UndeclaredNameVisitor(names) 
+    try: 
+        for node in nodes: 
+            visitor.visit(node) 
+    except VisitorExit: 
+        pass 
+    return visitor.undeclared 
+ 
+ 
+class MacroRef(object): 
+    def __init__(self, node): 
+        self.node = node 
+        self.accesses_caller = False 
+        self.accesses_kwargs = False 
+        self.accesses_varargs = False 
+ 
+ 
+class Frame(object): 
+    """Holds compile time information for us.""" 
+ 
+    def __init__(self, eval_ctx, parent=None, level=None): 
+        self.eval_ctx = eval_ctx 
         self.symbols = Symbols(parent and parent.symbols or None, level=level)
-
-        # a toplevel frame is the root + soft frames such as if conditions.
-        self.toplevel = False
-
-        # the root frame is basically just the outermost frame, so no if
-        # conditions.  This information is used to optimize inheritance
-        # situations.
-        self.rootlevel = False
-
-        # in some dynamic inheritance situations the compiler needs to add
-        # write tests around output statements.
-        self.require_output_check = parent and parent.require_output_check
-
-        # inside some tags we are using a buffer rather than yield statements.
-        # this for example affects {% filter %} or {% macro %}.  If a frame
-        # is buffered this variable points to the name of the list used as
-        # buffer.
-        self.buffer = None
-
-        # the name of the block we're in, otherwise None.
-        self.block = parent and parent.block or None
-
-        # the parent of this frame
-        self.parent = parent
-
-        if parent is not None:
-            self.buffer = parent.buffer
-
-    def copy(self):
-        """Create a copy of the current one."""
-        rv = object.__new__(self.__class__)
-        rv.__dict__.update(self.__dict__)
-        rv.symbols = self.symbols.copy()
-        return rv
-
-    def inner(self, isolated=False):
-        """Return an inner frame."""
-        if isolated:
-            return Frame(self.eval_ctx, level=self.symbols.level + 1)
-        return Frame(self.eval_ctx, self)
-
-    def soft(self):
-        """Return a soft frame.  A soft frame may not be modified as
-        standalone thing as it shares the resources with the frame it
-        was created of, but it's not a rootlevel frame any longer.
-
-        This is only used to implement if-statements.
-        """
-        rv = self.copy()
-        rv.rootlevel = False
-        return rv
-
-    __copy__ = copy
-
-
-class VisitorExit(RuntimeError):
-    """Exception used by the `UndeclaredNameVisitor` to signal a stop."""
-
-
-class DependencyFinderVisitor(NodeVisitor):
-    """A visitor that collects filter and test calls."""
-
-    def __init__(self):
-        self.filters = set()
-        self.tests = set()
-
-    def visit_Filter(self, node):
-        self.generic_visit(node)
-        self.filters.add(node.name)
-
-    def visit_Test(self, node):
-        self.generic_visit(node)
-        self.tests.add(node.name)
-
-    def visit_Block(self, node):
-        """Stop visiting at blocks."""
-
-
-class UndeclaredNameVisitor(NodeVisitor):
-    """A visitor that checks if a name is accessed without being
-    declared.  This is different from the frame visitor as it will
-    not stop at closure frames.
-    """
-
-    def __init__(self, names):
-        self.names = set(names)
-        self.undeclared = set()
-
-    def visit_Name(self, node):
+ 
+        # a toplevel frame is the root + soft frames such as if conditions. 
+        self.toplevel = False 
+ 
+        # the root frame is basically just the outermost frame, so no if 
+        # conditions.  This information is used to optimize inheritance 
+        # situations. 
+        self.rootlevel = False 
+ 
+        # in some dynamic inheritance situations the compiler needs to add 
+        # write tests around output statements. 
+        self.require_output_check = parent and parent.require_output_check 
+ 
+        # inside some tags we are using a buffer rather than yield statements. 
+        # this for example affects {% filter %} or {% macro %}.  If a frame 
+        # is buffered this variable points to the name of the list used as 
+        # buffer. 
+        self.buffer = None 
+ 
+        # the name of the block we're in, otherwise None. 
+        self.block = parent and parent.block or None 
+ 
+        # the parent of this frame 
+        self.parent = parent 
+ 
+        if parent is not None: 
+            self.buffer = parent.buffer 
+ 
+    def copy(self): 
+        """Create a copy of the current one.""" 
+        rv = object.__new__(self.__class__) 
+        rv.__dict__.update(self.__dict__) 
+        rv.symbols = self.symbols.copy() 
+        return rv 
+ 
+    def inner(self, isolated=False): 
+        """Return an inner frame.""" 
+        if isolated: 
+            return Frame(self.eval_ctx, level=self.symbols.level + 1) 
+        return Frame(self.eval_ctx, self) 
+ 
+    def soft(self): 
+        """Return a soft frame.  A soft frame may not be modified as 
+        standalone thing as it shares the resources with the frame it 
+        was created of, but it's not a rootlevel frame any longer. 
+ 
+        This is only used to implement if-statements. 
+        """ 
+        rv = self.copy() 
+        rv.rootlevel = False 
+        return rv 
+ 
+    __copy__ = copy 
+ 
+ 
+class VisitorExit(RuntimeError): 
+    """Exception used by the `UndeclaredNameVisitor` to signal a stop.""" 
+ 
+ 
+class DependencyFinderVisitor(NodeVisitor): 
+    """A visitor that collects filter and test calls.""" 
+ 
+    def __init__(self): 
+        self.filters = set() 
+        self.tests = set() 
+ 
+    def visit_Filter(self, node): 
+        self.generic_visit(node) 
+        self.filters.add(node.name) 
+ 
+    def visit_Test(self, node): 
+        self.generic_visit(node) 
+        self.tests.add(node.name) 
+ 
+    def visit_Block(self, node): 
+        """Stop visiting at blocks.""" 
+ 
+ 
+class UndeclaredNameVisitor(NodeVisitor): 
+    """A visitor that checks if a name is accessed without being 
+    declared.  This is different from the frame visitor as it will 
+    not stop at closure frames. 
+    """ 
+ 
+    def __init__(self, names): 
+        self.names = set(names) 
+        self.undeclared = set() 
+ 
+    def visit_Name(self, node): 
         if node.ctx == "load" and node.name in self.names:
-            self.undeclared.add(node.name)
-            if self.undeclared == self.names:
-                raise VisitorExit()
-        else:
-            self.names.discard(node.name)
-
-    def visit_Block(self, node):
-        """Stop visiting a blocks."""
-
-
-class CompilerExit(Exception):
-    """Raised if the compiler encountered a situation where it just
-    doesn't make sense to further process the code.  Any block that
-    raises such an exception is not further processed.
-    """
-
-
-class CodeGenerator(NodeVisitor):
+            self.undeclared.add(node.name) 
+            if self.undeclared == self.names: 
+                raise VisitorExit() 
+        else: 
+            self.names.discard(node.name) 
+ 
+    def visit_Block(self, node): 
+        """Stop visiting a blocks.""" 
+ 
+ 
+class CompilerExit(Exception): 
+    """Raised if the compiler encountered a situation where it just 
+    doesn't make sense to further process the code.  Any block that 
+    raises such an exception is not further processed. 
+    """ 
+ 
+ 
+class CodeGenerator(NodeVisitor): 
     def __init__(
         self, environment, name, filename, stream=None, defer_init=False, optimized=True
     ):
-        if stream is None:
-            stream = NativeStringIO()
-        self.environment = environment
-        self.name = name
-        self.filename = filename
-        self.stream = stream
-        self.created_block_context = False
-        self.defer_init = defer_init
-        self.optimized = optimized
-        if optimized:
-            self.optimizer = Optimizer(environment)
-
-        # aliases for imports
-        self.import_aliases = {}
-
-        # a registry for all blocks.  Because blocks are moved out
-        # into the global python scope they are registered here
-        self.blocks = {}
-
-        # the number of extends statements so far
-        self.extends_so_far = 0
-
-        # some templates have a rootlevel extends.  In this case we
-        # can safely assume that we're a child template and do some
-        # more optimizations.
-        self.has_known_extends = False
-
-        # the current line number
-        self.code_lineno = 1
-
-        # registry of all filters and tests (global, not block local)
-        self.tests = {}
-        self.filters = {}
-
-        # the debug information
-        self.debug_info = []
-        self._write_debug_info = None
-
-        # the number of new lines before the next write()
-        self._new_lines = 0
-
-        # the line number of the last written statement
-        self._last_line = 0
-
-        # true if nothing was written so far.
-        self._first_write = True
-
-        # used by the `temporary_identifier` method to get new
-        # unique, temporary identifier
-        self._last_identifier = 0
-
-        # the current indentation
-        self._indentation = 0
-
-        # Tracks toplevel assignments
-        self._assign_stack = []
-
-        # Tracks parameter definition blocks
-        self._param_def_block = []
-
-        # Tracks the current context.
+        if stream is None: 
+            stream = NativeStringIO() 
+        self.environment = environment 
+        self.name = name 
+        self.filename = filename 
+        self.stream = stream 
+        self.created_block_context = False 
+        self.defer_init = defer_init 
+        self.optimized = optimized 
+        if optimized: 
+            self.optimizer = Optimizer(environment) 
+ 
+        # aliases for imports 
+        self.import_aliases = {} 
+ 
+        # a registry for all blocks.  Because blocks are moved out 
+        # into the global python scope they are registered here 
+        self.blocks = {} 
+ 
+        # the number of extends statements so far 
+        self.extends_so_far = 0 
+ 
+        # some templates have a rootlevel extends.  In this case we 
+        # can safely assume that we're a child template and do some 
+        # more optimizations. 
+        self.has_known_extends = False 
+ 
+        # the current line number 
+        self.code_lineno = 1 
+ 
+        # registry of all filters and tests (global, not block local) 
+        self.tests = {} 
+        self.filters = {} 
+ 
+        # the debug information 
+        self.debug_info = [] 
+        self._write_debug_info = None 
+ 
+        # the number of new lines before the next write() 
+        self._new_lines = 0 
+ 
+        # the line number of the last written statement 
+        self._last_line = 0 
+ 
+        # true if nothing was written so far. 
+        self._first_write = True 
+ 
+        # used by the `temporary_identifier` method to get new 
+        # unique, temporary identifier 
+        self._last_identifier = 0 
+ 
+        # the current indentation 
+        self._indentation = 0 
+ 
+        # Tracks toplevel assignments 
+        self._assign_stack = [] 
+ 
+        # Tracks parameter definition blocks 
+        self._param_def_block = [] 
+ 
+        # Tracks the current context. 
         self._context_reference_stack = ["context"]
-
-    # -- Various compilation helpers
-
-    def fail(self, msg, lineno):
-        """Fail with a :exc:`TemplateAssertionError`."""
-        raise TemplateAssertionError(msg, lineno, self.name, self.filename)
-
-    def temporary_identifier(self):
-        """Get a new unique identifier."""
-        self._last_identifier += 1
+ 
+    # -- Various compilation helpers 
+ 
+    def fail(self, msg, lineno): 
+        """Fail with a :exc:`TemplateAssertionError`.""" 
+        raise TemplateAssertionError(msg, lineno, self.name, self.filename) 
+ 
+    def temporary_identifier(self): 
+        """Get a new unique identifier.""" 
+        self._last_identifier += 1 
         return "t_%d" % self._last_identifier
-
-    def buffer(self, frame):
-        """Enable buffering for the frame from that point onwards."""
-        frame.buffer = self.temporary_identifier()
+ 
+    def buffer(self, frame): 
+        """Enable buffering for the frame from that point onwards.""" 
+        frame.buffer = self.temporary_identifier() 
         self.writeline("%s = []" % frame.buffer)
-
-    def return_buffer_contents(self, frame, force_unescaped=False):
-        """Return the buffer contents of the frame."""
-        if not force_unescaped:
-            if frame.eval_ctx.volatile:
+ 
+    def return_buffer_contents(self, frame, force_unescaped=False): 
+        """Return the buffer contents of the frame.""" 
+        if not force_unescaped: 
+            if frame.eval_ctx.volatile: 
                 self.writeline("if context.eval_ctx.autoescape:")
-                self.indent()
+                self.indent() 
                 self.writeline("return Markup(concat(%s))" % frame.buffer)
-                self.outdent()
+                self.outdent() 
                 self.writeline("else:")
-                self.indent()
+                self.indent() 
                 self.writeline("return concat(%s)" % frame.buffer)
-                self.outdent()
-                return
-            elif frame.eval_ctx.autoescape:
+                self.outdent() 
+                return 
+            elif frame.eval_ctx.autoescape: 
                 self.writeline("return Markup(concat(%s))" % frame.buffer)
-                return
+                return 
         self.writeline("return concat(%s)" % frame.buffer)
-
-    def indent(self):
-        """Indent by one."""
-        self._indentation += 1
-
-    def outdent(self, step=1):
-        """Outdent by step."""
-        self._indentation -= step
-
-    def start_write(self, frame, node=None):
-        """Yield or write into the frame buffer."""
-        if frame.buffer is None:
+ 
+    def indent(self): 
+        """Indent by one.""" 
+        self._indentation += 1 
+ 
+    def outdent(self, step=1): 
+        """Outdent by step.""" 
+        self._indentation -= step 
+ 
+    def start_write(self, frame, node=None): 
+        """Yield or write into the frame buffer.""" 
+        if frame.buffer is None: 
             self.writeline("yield ", node)
-        else:
+        else: 
             self.writeline("%s.append(" % frame.buffer, node)
-
-    def end_write(self, frame):
-        """End the writing process started by `start_write`."""
-        if frame.buffer is not None:
+ 
+    def end_write(self, frame): 
+        """End the writing process started by `start_write`.""" 
+        if frame.buffer is not None: 
             self.write(")")
-
-    def simple_write(self, s, frame, node=None):
-        """Simple shortcut for start_write + write + end_write."""
-        self.start_write(frame, node)
-        self.write(s)
-        self.end_write(frame)
-
-    def blockvisit(self, nodes, frame):
-        """Visit a list of nodes as block in a frame.  If the current frame
-        is no buffer a dummy ``if 0: yield None`` is written automatically.
-        """
-        try:
+ 
+    def simple_write(self, s, frame, node=None): 
+        """Simple shortcut for start_write + write + end_write.""" 
+        self.start_write(frame, node) 
+        self.write(s) 
+        self.end_write(frame) 
+ 
+    def blockvisit(self, nodes, frame): 
+        """Visit a list of nodes as block in a frame.  If the current frame 
+        is no buffer a dummy ``if 0: yield None`` is written automatically. 
+        """ 
+        try: 
             self.writeline("pass")
-            for node in nodes:
-                self.visit(node, frame)
-        except CompilerExit:
-            pass
-
-    def write(self, x):
-        """Write a string into the output stream."""
-        if self._new_lines:
-            if not self._first_write:
+            for node in nodes: 
+                self.visit(node, frame) 
+        except CompilerExit: 
+            pass 
+ 
+    def write(self, x): 
+        """Write a string into the output stream.""" 
+        if self._new_lines: 
+            if not self._first_write: 
                 self.stream.write("\n" * self._new_lines)
-                self.code_lineno += self._new_lines
-                if self._write_debug_info is not None:
+                self.code_lineno += self._new_lines 
+                if self._write_debug_info is not None: 
                     self.debug_info.append((self._write_debug_info, self.code_lineno))
-                    self._write_debug_info = None
-            self._first_write = False
+                    self._write_debug_info = None 
+            self._first_write = False 
             self.stream.write("    " * self._indentation)
-            self._new_lines = 0
-        self.stream.write(x)
-
-    def writeline(self, x, node=None, extra=0):
-        """Combination of newline and write."""
-        self.newline(node, extra)
-        self.write(x)
-
-    def newline(self, node=None, extra=0):
-        """Add one or more newlines before the next write."""
-        self._new_lines = max(self._new_lines, 1 + extra)
-        if node is not None and node.lineno != self._last_line:
-            self._write_debug_info = node.lineno
-            self._last_line = node.lineno
-
-    def signature(self, node, frame, extra_kwargs=None):
-        """Writes a function call to the stream for the current node.
-        A leading comma is added automatically.  The extra keyword
-        arguments may not include python keywords otherwise a syntax
+            self._new_lines = 0 
+        self.stream.write(x) 
+ 
+    def writeline(self, x, node=None, extra=0): 
+        """Combination of newline and write.""" 
+        self.newline(node, extra) 
+        self.write(x) 
+ 
+    def newline(self, node=None, extra=0): 
+        """Add one or more newlines before the next write.""" 
+        self._new_lines = max(self._new_lines, 1 + extra) 
+        if node is not None and node.lineno != self._last_line: 
+            self._write_debug_info = node.lineno 
+            self._last_line = node.lineno 
+ 
+    def signature(self, node, frame, extra_kwargs=None): 
+        """Writes a function call to the stream for the current node. 
+        A leading comma is added automatically.  The extra keyword 
+        arguments may not include python keywords otherwise a syntax 
         error could occur.  The extra keyword arguments should be given
-        as python dict.
-        """
-        # if any of the given keyword arguments is a python keyword
-        # we have to make sure that no invalid call is created.
-        kwarg_workaround = False
-        for kwarg in chain((x.key for x in node.kwargs), extra_kwargs or ()):
-            if is_python_keyword(kwarg):
-                kwarg_workaround = True
-                break
-
-        for arg in node.args:
+        as python dict. 
+        """ 
+        # if any of the given keyword arguments is a python keyword 
+        # we have to make sure that no invalid call is created. 
+        kwarg_workaround = False 
+        for kwarg in chain((x.key for x in node.kwargs), extra_kwargs or ()): 
+            if is_python_keyword(kwarg): 
+                kwarg_workaround = True 
+                break 
+ 
+        for arg in node.args: 
             self.write(", ")
-            self.visit(arg, frame)
-
-        if not kwarg_workaround:
-            for kwarg in node.kwargs:
+            self.visit(arg, frame) 
+ 
+        if not kwarg_workaround: 
+            for kwarg in node.kwargs: 
                 self.write(", ")
-                self.visit(kwarg, frame)
-            if extra_kwargs is not None:
-                for key, value in iteritems(extra_kwargs):
+                self.visit(kwarg, frame) 
+            if extra_kwargs is not None: 
+                for key, value in iteritems(extra_kwargs): 
                     self.write(", %s=%s" % (key, value))
-        if node.dyn_args:
+        if node.dyn_args: 
             self.write(", *")
-            self.visit(node.dyn_args, frame)
-
-        if kwarg_workaround:
-            if node.dyn_kwargs is not None:
+            self.visit(node.dyn_args, frame) 
+ 
+        if kwarg_workaround: 
+            if node.dyn_kwargs is not None: 
                 self.write(", **dict({")
-            else:
+            else: 
                 self.write(", **{")
-            for kwarg in node.kwargs:
+            for kwarg in node.kwargs: 
                 self.write("%r: " % kwarg.key)
-                self.visit(kwarg.value, frame)
+                self.visit(kwarg.value, frame) 
                 self.write(", ")
-            if extra_kwargs is not None:
-                for key, value in iteritems(extra_kwargs):
+            if extra_kwargs is not None: 
+                for key, value in iteritems(extra_kwargs): 
                     self.write("%r: %s, " % (key, value))
-            if node.dyn_kwargs is not None:
+            if node.dyn_kwargs is not None: 
                 self.write("}, **")
-                self.visit(node.dyn_kwargs, frame)
+                self.visit(node.dyn_kwargs, frame) 
                 self.write(")")
-            else:
+            else: 
                 self.write("}")
-
-        elif node.dyn_kwargs is not None:
+ 
+        elif node.dyn_kwargs is not None: 
             self.write(", **")
-            self.visit(node.dyn_kwargs, frame)
-
-    def pull_dependencies(self, nodes):
-        """Pull all the dependencies."""
-        visitor = DependencyFinderVisitor()
-        for node in nodes:
-            visitor.visit(node)
+            self.visit(node.dyn_kwargs, frame) 
+ 
+    def pull_dependencies(self, nodes): 
+        """Pull all the dependencies.""" 
+        visitor = DependencyFinderVisitor() 
+        for node in nodes: 
+            visitor.visit(node) 
         for dependency in "filters", "tests":
-            mapping = getattr(self, dependency)
-            for name in getattr(visitor, dependency):
-                if name not in mapping:
-                    mapping[name] = self.temporary_identifier()
+            mapping = getattr(self, dependency) 
+            for name in getattr(visitor, dependency): 
+                if name not in mapping: 
+                    mapping[name] = self.temporary_identifier() 
                 self.writeline(
                     "%s = environment.%s[%r]" % (mapping[name], dependency, name)
                 )
-
-    def enter_frame(self, frame):
-        undefs = []
-        for target, (action, param) in iteritems(frame.symbols.loads):
-            if action == VAR_LOAD_PARAMETER:
-                pass
-            elif action == VAR_LOAD_RESOLVE:
+ 
+    def enter_frame(self, frame): 
+        undefs = [] 
+        for target, (action, param) in iteritems(frame.symbols.loads): 
+            if action == VAR_LOAD_PARAMETER: 
+                pass 
+            elif action == VAR_LOAD_RESOLVE: 
                 self.writeline("%s = %s(%r)" % (target, self.get_resolve_func(), param))
-            elif action == VAR_LOAD_ALIAS:
+            elif action == VAR_LOAD_ALIAS: 
                 self.writeline("%s = %s" % (target, param))
-            elif action == VAR_LOAD_UNDEFINED:
-                undefs.append(target)
-            else:
+            elif action == VAR_LOAD_UNDEFINED: 
+                undefs.append(target) 
+            else: 
                 raise NotImplementedError("unknown load instruction")
-        if undefs:
+        if undefs: 
             self.writeline("%s = missing" % " = ".join(undefs))
-
-    def leave_frame(self, frame, with_python_scope=False):
-        if not with_python_scope:
-            undefs = []
-            for target, _ in iteritems(frame.symbols.loads):
-                undefs.append(target)
-            if undefs:
+ 
+    def leave_frame(self, frame, with_python_scope=False): 
+        if not with_python_scope: 
+            undefs = [] 
+            for target, _ in iteritems(frame.symbols.loads): 
+                undefs.append(target) 
+            if undefs: 
                 self.writeline("%s = missing" % " = ".join(undefs))
-
-    def func(self, name):
-        if self.environment.is_async:
+ 
+    def func(self, name): 
+        if self.environment.is_async: 
             return "async def %s" % name
         return "def %s" % name
-
-    def macro_body(self, node, frame):
-        """Dump the function def of a macro or call block."""
-        frame = frame.inner()
-        frame.symbols.analyze_node(node)
-        macro_ref = MacroRef(node)
-
-        explicit_caller = None
-        skip_special_params = set()
-        args = []
-        for idx, arg in enumerate(node.args):
+ 
+    def macro_body(self, node, frame): 
+        """Dump the function def of a macro or call block.""" 
+        frame = frame.inner() 
+        frame.symbols.analyze_node(node) 
+        macro_ref = MacroRef(node) 
+ 
+        explicit_caller = None 
+        skip_special_params = set() 
+        args = [] 
+        for idx, arg in enumerate(node.args): 
             if arg.name == "caller":
-                explicit_caller = idx
+                explicit_caller = idx 
             if arg.name in ("kwargs", "varargs"):
-                skip_special_params.add(arg.name)
-            args.append(frame.symbols.ref(arg.name))
-
+                skip_special_params.add(arg.name) 
+            args.append(frame.symbols.ref(arg.name)) 
+ 
         undeclared = find_undeclared(node.body, ("caller", "kwargs", "varargs"))
-
+ 
         if "caller" in undeclared:
             # In older Jinja versions there was a bug that allowed caller
-            # to retain the special behavior even if it was mentioned in
-            # the argument list.  However thankfully this was only really
-            # working if it was the last argument.  So we are explicitly
-            # checking this now and error out if it is anywhere else in
-            # the argument list.
-            if explicit_caller is not None:
-                try:
-                    node.defaults[explicit_caller - len(node.args)]
-                except IndexError:
+            # to retain the special behavior even if it was mentioned in 
+            # the argument list.  However thankfully this was only really 
+            # working if it was the last argument.  So we are explicitly 
+            # checking this now and error out if it is anywhere else in 
+            # the argument list. 
+            if explicit_caller is not None: 
+                try: 
+                    node.defaults[explicit_caller - len(node.args)] 
+                except IndexError: 
                     self.fail(
                         "When defining macros or call blocks the "
                         'special "caller" argument must be omitted '
                         "or be given a default.",
                         node.lineno,
                     )
-            else:
+            else: 
                 args.append(frame.symbols.declare_parameter("caller"))
-            macro_ref.accesses_caller = True
+            macro_ref.accesses_caller = True 
         if "kwargs" in undeclared and "kwargs" not in skip_special_params:
             args.append(frame.symbols.declare_parameter("kwargs"))
-            macro_ref.accesses_kwargs = True
+            macro_ref.accesses_kwargs = True 
         if "varargs" in undeclared and "varargs" not in skip_special_params:
             args.append(frame.symbols.declare_parameter("varargs"))
-            macro_ref.accesses_varargs = True
-
-        # macros are delayed, they never require output checks
-        frame.require_output_check = False
-        frame.symbols.analyze_node(node)
+            macro_ref.accesses_varargs = True 
+ 
+        # macros are delayed, they never require output checks 
+        frame.require_output_check = False 
+        frame.symbols.analyze_node(node) 
         self.writeline("%s(%s):" % (self.func("macro"), ", ".join(args)), node)
-        self.indent()
-
-        self.buffer(frame)
-        self.enter_frame(frame)
-
-        self.push_parameter_definitions(frame)
-        for idx, arg in enumerate(node.args):
-            ref = frame.symbols.ref(arg.name)
+        self.indent() 
+ 
+        self.buffer(frame) 
+        self.enter_frame(frame) 
+ 
+        self.push_parameter_definitions(frame) 
+        for idx, arg in enumerate(node.args): 
+            ref = frame.symbols.ref(arg.name) 
             self.writeline("if %s is missing:" % ref)
-            self.indent()
-            try:
-                default = node.defaults[idx - len(node.args)]
-            except IndexError:
+            self.indent() 
+            try: 
+                default = node.defaults[idx - len(node.args)] 
+            except IndexError: 
                 self.writeline(
                     "%s = undefined(%r, name=%r)"
                     % (ref, "parameter %r was not provided" % arg.name, arg.name)
                 )
-            else:
+            else: 
                 self.writeline("%s = " % ref)
-                self.visit(default, frame)
-            self.mark_parameter_stored(ref)
-            self.outdent()
-        self.pop_parameter_definitions()
-
-        self.blockvisit(node.body, frame)
-        self.return_buffer_contents(frame, force_unescaped=True)
-        self.leave_frame(frame, with_python_scope=True)
-        self.outdent()
-
-        return frame, macro_ref
-
-    def macro_def(self, macro_ref, frame):
-        """Dump the macro definition for the def created by macro_body."""
+                self.visit(default, frame) 
+            self.mark_parameter_stored(ref) 
+            self.outdent() 
+        self.pop_parameter_definitions() 
+ 
+        self.blockvisit(node.body, frame) 
+        self.return_buffer_contents(frame, force_unescaped=True) 
+        self.leave_frame(frame, with_python_scope=True) 
+        self.outdent() 
+ 
+        return frame, macro_ref 
+ 
+    def macro_def(self, macro_ref, frame): 
+        """Dump the macro definition for the def created by macro_body.""" 
         arg_tuple = ", ".join(repr(x.name) for x in macro_ref.node.args)
         name = getattr(macro_ref.node, "name", None)
-        if len(macro_ref.node.args) == 1:
+        if len(macro_ref.node.args) == 1: 
             arg_tuple += ","
         self.write(
             "Macro(environment, macro, %r, (%s), %r, %r, %r, "
@@ -601,213 +601,213 @@ class CodeGenerator(NodeVisitor):
                 macro_ref.accesses_caller,
             )
         )
-
-    def position(self, node):
-        """Return a human readable position for the node."""
+ 
+    def position(self, node): 
+        """Return a human readable position for the node.""" 
         rv = "line %d" % node.lineno
-        if self.name is not None:
+        if self.name is not None: 
             rv += " in " + repr(self.name)
-        return rv
-
-    def dump_local_context(self, frame):
+        return rv 
+ 
+    def dump_local_context(self, frame): 
         return "{%s}" % ", ".join(
             "%r: %s" % (name, target)
             for name, target in iteritems(frame.symbols.dump_stores())
         )
-
-    def write_commons(self):
-        """Writes a common preamble that is used by root and block functions.
-        Primarily this sets up common local helpers and enforces a generator
-        through a dead branch.
-        """
+ 
+    def write_commons(self): 
+        """Writes a common preamble that is used by root and block functions. 
+        Primarily this sets up common local helpers and enforces a generator 
+        through a dead branch. 
+        """ 
         self.writeline("resolve = context.resolve_or_missing")
         self.writeline("undefined = environment.undefined")
         # always use the standard Undefined class for the implicit else of
         # conditional expressions
         self.writeline("cond_expr_undefined = Undefined")
         self.writeline("if 0: yield None")
-
-    def push_parameter_definitions(self, frame):
-        """Pushes all parameter targets from the given frame into a local
-        stack that permits tracking of yet to be assigned parameters.  In
-        particular this enables the optimization from `visit_Name` to skip
-        undefined expressions for parameters in macros as macros can reference
-        otherwise unbound parameters.
-        """
-        self._param_def_block.append(frame.symbols.dump_param_targets())
-
-    def pop_parameter_definitions(self):
-        """Pops the current parameter definitions set."""
-        self._param_def_block.pop()
-
-    def mark_parameter_stored(self, target):
-        """Marks a parameter in the current parameter definitions as stored.
-        This will skip the enforced undefined checks.
-        """
-        if self._param_def_block:
-            self._param_def_block[-1].discard(target)
-
-    def push_context_reference(self, target):
-        self._context_reference_stack.append(target)
-
-    def pop_context_reference(self):
-        self._context_reference_stack.pop()
-
-    def get_context_ref(self):
-        return self._context_reference_stack[-1]
-
-    def get_resolve_func(self):
-        target = self._context_reference_stack[-1]
+ 
+    def push_parameter_definitions(self, frame): 
+        """Pushes all parameter targets from the given frame into a local 
+        stack that permits tracking of yet to be assigned parameters.  In 
+        particular this enables the optimization from `visit_Name` to skip 
+        undefined expressions for parameters in macros as macros can reference 
+        otherwise unbound parameters. 
+        """ 
+        self._param_def_block.append(frame.symbols.dump_param_targets()) 
+ 
+    def pop_parameter_definitions(self): 
+        """Pops the current parameter definitions set.""" 
+        self._param_def_block.pop() 
+ 
+    def mark_parameter_stored(self, target): 
+        """Marks a parameter in the current parameter definitions as stored. 
+        This will skip the enforced undefined checks. 
+        """ 
+        if self._param_def_block: 
+            self._param_def_block[-1].discard(target) 
+ 
+    def push_context_reference(self, target): 
+        self._context_reference_stack.append(target) 
+ 
+    def pop_context_reference(self): 
+        self._context_reference_stack.pop() 
+ 
+    def get_context_ref(self): 
+        return self._context_reference_stack[-1] 
+ 
+    def get_resolve_func(self): 
+        target = self._context_reference_stack[-1] 
         if target == "context":
             return "resolve"
         return "%s.resolve" % target
-
-    def derive_context(self, frame):
+ 
+    def derive_context(self, frame): 
         return "%s.derived(%s)" % (
-            self.get_context_ref(),
-            self.dump_local_context(frame),
-        )
-
-    def parameter_is_undeclared(self, target):
-        """Checks if a given target is an undeclared parameter."""
-        if not self._param_def_block:
-            return False
-        return target in self._param_def_block[-1]
-
-    def push_assign_tracking(self):
-        """Pushes a new layer for assignment tracking."""
-        self._assign_stack.append(set())
-
-    def pop_assign_tracking(self, frame):
-        """Pops the topmost level for assignment tracking and updates the
-        context variables if necessary.
-        """
-        vars = self._assign_stack.pop()
-        if not frame.toplevel or not vars:
-            return
+            self.get_context_ref(), 
+            self.dump_local_context(frame), 
+        ) 
+ 
+    def parameter_is_undeclared(self, target): 
+        """Checks if a given target is an undeclared parameter.""" 
+        if not self._param_def_block: 
+            return False 
+        return target in self._param_def_block[-1] 
+ 
+    def push_assign_tracking(self): 
+        """Pushes a new layer for assignment tracking.""" 
+        self._assign_stack.append(set()) 
+ 
+    def pop_assign_tracking(self, frame): 
+        """Pops the topmost level for assignment tracking and updates the 
+        context variables if necessary. 
+        """ 
+        vars = self._assign_stack.pop() 
+        if not frame.toplevel or not vars: 
+            return 
         public_names = [x for x in vars if x[:1] != "_"]
-        if len(vars) == 1:
-            name = next(iter(vars))
-            ref = frame.symbols.ref(name)
+        if len(vars) == 1: 
+            name = next(iter(vars)) 
+            ref = frame.symbols.ref(name) 
             self.writeline("context.vars[%r] = %s" % (name, ref))
-        else:
+        else: 
             self.writeline("context.vars.update({")
-            for idx, name in enumerate(vars):
-                if idx:
+            for idx, name in enumerate(vars): 
+                if idx: 
                     self.write(", ")
-                ref = frame.symbols.ref(name)
+                ref = frame.symbols.ref(name) 
                 self.write("%r: %s" % (name, ref))
             self.write("})")
-        if public_names:
-            if len(public_names) == 1:
+        if public_names: 
+            if len(public_names) == 1: 
                 self.writeline("context.exported_vars.add(%r)" % public_names[0])
-            else:
+            else: 
                 self.writeline(
                     "context.exported_vars.update((%s))"
                     % ", ".join(imap(repr, public_names))
                 )
-
-    # -- Statement Visitors
-
-    def visit_Template(self, node, frame=None):
+ 
+    # -- Statement Visitors 
+ 
+    def visit_Template(self, node, frame=None): 
         assert frame is None, "no root frame allowed"
-        eval_ctx = EvalContext(self.environment, self.name)
-
+        eval_ctx = EvalContext(self.environment, self.name) 
+ 
         from .runtime import exported
-
+ 
         self.writeline("from __future__ import %s" % ", ".join(code_features))
         self.writeline("from jinja2.runtime import " + ", ".join(exported))
 
-        if self.environment.is_async:
+        if self.environment.is_async: 
             self.writeline(
                 "from jinja2.asyncsupport import auto_await, "
                 "auto_aiter, AsyncLoopContext"
             )
-
-        # if we want a deferred initialization we cannot move the
-        # environment into a local name
+ 
+        # if we want a deferred initialization we cannot move the 
+        # environment into a local name 
         envenv = not self.defer_init and ", environment=environment" or ""
-
-        # do we have an extends tag at all?  If not, we can save some
-        # overhead by just not processing any inheritance code.
-        have_extends = node.find(nodes.Extends) is not None
-
-        # find all blocks
-        for block in node.find_all(nodes.Block):
-            if block.name in self.blocks:
+ 
+        # do we have an extends tag at all?  If not, we can save some 
+        # overhead by just not processing any inheritance code. 
+        have_extends = node.find(nodes.Extends) is not None 
+ 
+        # find all blocks 
+        for block in node.find_all(nodes.Block): 
+            if block.name in self.blocks: 
                 self.fail("block %r defined twice" % block.name, block.lineno)
-            self.blocks[block.name] = block
-
-        # find all imports and import them
-        for import_ in node.find_all(nodes.ImportedName):
-            if import_.importname not in self.import_aliases:
-                imp = import_.importname
-                self.import_aliases[imp] = alias = self.temporary_identifier()
+            self.blocks[block.name] = block 
+ 
+        # find all imports and import them 
+        for import_ in node.find_all(nodes.ImportedName): 
+            if import_.importname not in self.import_aliases: 
+                imp = import_.importname 
+                self.import_aliases[imp] = alias = self.temporary_identifier() 
                 if "." in imp:
                     module, obj = imp.rsplit(".", 1)
                     self.writeline("from %s import %s as %s" % (module, obj, alias))
-                else:
+                else: 
                     self.writeline("import %s as %s" % (imp, alias))
-
-        # add the load name
+ 
+        # add the load name 
         self.writeline("name = %r" % self.name)
-
-        # generate the root render function.
+ 
+        # generate the root render function. 
         self.writeline(
             "%s(context, missing=missing%s):" % (self.func("root"), envenv), extra=1
         )
-        self.indent()
-        self.write_commons()
-
-        # process the root
-        frame = Frame(eval_ctx)
+        self.indent() 
+        self.write_commons() 
+ 
+        # process the root 
+        frame = Frame(eval_ctx) 
         if "self" in find_undeclared(node.body, ("self",)):
             ref = frame.symbols.declare_parameter("self")
             self.writeline("%s = TemplateReference(context)" % ref)
-        frame.symbols.analyze_node(node)
-        frame.toplevel = frame.rootlevel = True
-        frame.require_output_check = have_extends and not self.has_known_extends
-        if have_extends:
+        frame.symbols.analyze_node(node) 
+        frame.toplevel = frame.rootlevel = True 
+        frame.require_output_check = have_extends and not self.has_known_extends 
+        if have_extends: 
             self.writeline("parent_template = None")
-        self.enter_frame(frame)
-        self.pull_dependencies(node.body)
-        self.blockvisit(node.body, frame)
-        self.leave_frame(frame, with_python_scope=True)
-        self.outdent()
-
-        # make sure that the parent root is called.
-        if have_extends:
-            if not self.has_known_extends:
-                self.indent()
+        self.enter_frame(frame) 
+        self.pull_dependencies(node.body) 
+        self.blockvisit(node.body, frame) 
+        self.leave_frame(frame, with_python_scope=True) 
+        self.outdent() 
+ 
+        # make sure that the parent root is called. 
+        if have_extends: 
+            if not self.has_known_extends: 
+                self.indent() 
                 self.writeline("if parent_template is not None:")
-            self.indent()
-            if supports_yield_from and not self.environment.is_async:
+            self.indent() 
+            if supports_yield_from and not self.environment.is_async: 
                 self.writeline("yield from parent_template.root_render_func(context)")
-            else:
+            else: 
                 self.writeline(
                     "%sfor event in parent_template."
                     "root_render_func(context):"
                     % (self.environment.is_async and "async " or "")
                 )
-                self.indent()
+                self.indent() 
                 self.writeline("yield event")
-                self.outdent()
-            self.outdent(1 + (not self.has_known_extends))
-
-        # at this point we now have the blocks collected and can visit them too.
-        for name, block in iteritems(self.blocks):
+                self.outdent() 
+            self.outdent(1 + (not self.has_known_extends)) 
+ 
+        # at this point we now have the blocks collected and can visit them too. 
+        for name, block in iteritems(self.blocks): 
             self.writeline(
                 "%s(context, missing=missing%s):"
                 % (self.func("block_" + name), envenv),
                 block,
                 1,
             )
-            self.indent()
-            self.write_commons()
-            # It's important that we do not make this frame a child of the
-            # toplevel template.  This would cause a variety of
-            # interesting issues with identifier tracking.
-            block_frame = Frame(eval_ctx)
+            self.indent() 
+            self.write_commons() 
+            # It's important that we do not make this frame a child of the 
+            # toplevel template.  This would cause a variety of 
+            # interesting issues with identifier tracking. 
+            block_frame = Frame(eval_ctx) 
             undeclared = find_undeclared(block.body, ("self", "super"))
             if "self" in undeclared:
                 ref = block_frame.symbols.declare_parameter("self")
@@ -815,42 +815,42 @@ class CodeGenerator(NodeVisitor):
             if "super" in undeclared:
                 ref = block_frame.symbols.declare_parameter("super")
                 self.writeline("%s = context.super(%r, block_%s)" % (ref, name, name))
-            block_frame.symbols.analyze_node(block)
-            block_frame.block = name
-            self.enter_frame(block_frame)
-            self.pull_dependencies(block.body)
-            self.blockvisit(block.body, block_frame)
-            self.leave_frame(block_frame, with_python_scope=True)
-            self.outdent()
-
+            block_frame.symbols.analyze_node(block) 
+            block_frame.block = name 
+            self.enter_frame(block_frame) 
+            self.pull_dependencies(block.body) 
+            self.blockvisit(block.body, block_frame) 
+            self.leave_frame(block_frame, with_python_scope=True) 
+            self.outdent() 
+ 
         self.writeline(
             "blocks = {%s}" % ", ".join("%r: block_%s" % (x, x) for x in self.blocks),
             extra=1,
         )
-
-        # add a function that returns the debug info
+ 
+        # add a function that returns the debug info 
         self.writeline(
             "debug_info = %r" % "&".join("%s=%s" % x for x in self.debug_info)
         )
-
-    def visit_Block(self, node, frame):
-        """Call a block and register it for the template."""
-        level = 0
-        if frame.toplevel:
-            # if we know that we are a child template, there is no need to
-            # check if we are one
-            if self.has_known_extends:
-                return
-            if self.extends_so_far > 0:
+ 
+    def visit_Block(self, node, frame): 
+        """Call a block and register it for the template.""" 
+        level = 0 
+        if frame.toplevel: 
+            # if we know that we are a child template, there is no need to 
+            # check if we are one 
+            if self.has_known_extends: 
+                return 
+            if self.extends_so_far > 0: 
                 self.writeline("if parent_template is None:")
-                self.indent()
-                level += 1
-
-        if node.scoped:
-            context = self.derive_context(frame)
-        else:
-            context = self.get_context_ref()
-
+                self.indent() 
+                level += 1 
+ 
+        if node.scoped: 
+            context = self.derive_context(frame) 
+        else: 
+            context = self.get_context_ref() 
+ 
         if (
             supports_yield_from
             and not self.environment.is_async
@@ -859,132 +859,132 @@ class CodeGenerator(NodeVisitor):
             self.writeline(
                 "yield from context.blocks[%r][0](%s)" % (node.name, context), node
             )
-        else:
+        else: 
             loop = self.environment.is_async and "async for" or "for"
             self.writeline(
                 "%s event in context.blocks[%r][0](%s):" % (loop, node.name, context),
                 node,
             )
-            self.indent()
+            self.indent() 
             self.simple_write("event", frame)
-            self.outdent()
-
-        self.outdent(level)
-
-    def visit_Extends(self, node, frame):
-        """Calls the extender."""
-        if not frame.toplevel:
+            self.outdent() 
+ 
+        self.outdent(level) 
+ 
+    def visit_Extends(self, node, frame): 
+        """Calls the extender.""" 
+        if not frame.toplevel: 
             self.fail("cannot use extend from a non top-level scope", node.lineno)
-
-        # if the number of extends statements in general is zero so
-        # far, we don't have to add a check if something extended
-        # the template before this one.
-        if self.extends_so_far > 0:
-
-            # if we have a known extends we just add a template runtime
-            # error into the generated code.  We could catch that at compile
-            # time too, but i welcome it not to confuse users by throwing the
-            # same error at different times just "because we can".
-            if not self.has_known_extends:
+ 
+        # if the number of extends statements in general is zero so 
+        # far, we don't have to add a check if something extended 
+        # the template before this one. 
+        if self.extends_so_far > 0: 
+ 
+            # if we have a known extends we just add a template runtime 
+            # error into the generated code.  We could catch that at compile 
+            # time too, but i welcome it not to confuse users by throwing the 
+            # same error at different times just "because we can". 
+            if not self.has_known_extends: 
                 self.writeline("if parent_template is not None:")
-                self.indent()
+                self.indent() 
             self.writeline("raise TemplateRuntimeError(%r)" % "extended multiple times")
-
-            # if we have a known extends already we don't need that code here
-            # as we know that the template execution will end here.
-            if self.has_known_extends:
-                raise CompilerExit()
-            else:
-                self.outdent()
-
+ 
+            # if we have a known extends already we don't need that code here 
+            # as we know that the template execution will end here. 
+            if self.has_known_extends: 
+                raise CompilerExit() 
+            else: 
+                self.outdent() 
+ 
         self.writeline("parent_template = environment.get_template(", node)
-        self.visit(node.template, frame)
+        self.visit(node.template, frame) 
         self.write(", %r)" % self.name)
         self.writeline(
             "for name, parent_block in parent_template.blocks.%s():" % dict_item_iter
         )
-        self.indent()
+        self.indent() 
         self.writeline("context.blocks.setdefault(name, []).append(parent_block)")
-        self.outdent()
-
-        # if this extends statement was in the root level we can take
-        # advantage of that information and simplify the generated code
-        # in the top level from this point onwards
-        if frame.rootlevel:
-            self.has_known_extends = True
-
-        # and now we have one more
-        self.extends_so_far += 1
-
-    def visit_Include(self, node, frame):
-        """Handles includes."""
-        if node.ignore_missing:
+        self.outdent() 
+ 
+        # if this extends statement was in the root level we can take 
+        # advantage of that information and simplify the generated code 
+        # in the top level from this point onwards 
+        if frame.rootlevel: 
+            self.has_known_extends = True 
+ 
+        # and now we have one more 
+        self.extends_so_far += 1 
+ 
+    def visit_Include(self, node, frame): 
+        """Handles includes.""" 
+        if node.ignore_missing: 
             self.writeline("try:")
-            self.indent()
-
+            self.indent() 
+ 
         func_name = "get_or_select_template"
-        if isinstance(node.template, nodes.Const):
-            if isinstance(node.template.value, string_types):
+        if isinstance(node.template, nodes.Const): 
+            if isinstance(node.template.value, string_types): 
                 func_name = "get_template"
-            elif isinstance(node.template.value, (tuple, list)):
+            elif isinstance(node.template.value, (tuple, list)): 
                 func_name = "select_template"
-        elif isinstance(node.template, (nodes.Tuple, nodes.List)):
+        elif isinstance(node.template, (nodes.Tuple, nodes.List)): 
             func_name = "select_template"
-
+ 
         self.writeline("template = environment.%s(" % func_name, node)
-        self.visit(node.template, frame)
+        self.visit(node.template, frame) 
         self.write(", %r)" % self.name)
-        if node.ignore_missing:
-            self.outdent()
+        if node.ignore_missing: 
+            self.outdent() 
             self.writeline("except TemplateNotFound:")
-            self.indent()
+            self.indent() 
             self.writeline("pass")
-            self.outdent()
+            self.outdent() 
             self.writeline("else:")
-            self.indent()
-
-        skip_event_yield = False
-        if node.with_context:
+            self.indent() 
+ 
+        skip_event_yield = False 
+        if node.with_context: 
             loop = self.environment.is_async and "async for" or "for"
             self.writeline(
                 "%s event in template.root_render_func("
                 "template.new_context(context.get_all(), True, "
                 "%s)):" % (loop, self.dump_local_context(frame))
             )
-        elif self.environment.is_async:
+        elif self.environment.is_async: 
             self.writeline(
                 "for event in (await "
                 "template._get_default_module_async())"
                 "._body_stream:"
             )
-        else:
-            if supports_yield_from:
+        else: 
+            if supports_yield_from: 
                 self.writeline("yield from template._get_default_module()._body_stream")
-                skip_event_yield = True
-            else:
+                skip_event_yield = True 
+            else: 
                 self.writeline(
                     "for event in template._get_default_module()._body_stream:"
                 )
-
-        if not skip_event_yield:
-            self.indent()
+ 
+        if not skip_event_yield: 
+            self.indent() 
             self.simple_write("event", frame)
-            self.outdent()
-
-        if node.ignore_missing:
-            self.outdent()
-
-    def visit_Import(self, node, frame):
-        """Visit regular imports."""
+            self.outdent() 
+ 
+        if node.ignore_missing: 
+            self.outdent() 
+ 
+    def visit_Import(self, node, frame): 
+        """Visit regular imports.""" 
         self.writeline("%s = " % frame.symbols.ref(node.target), node)
-        if frame.toplevel:
+        if frame.toplevel: 
             self.write("context.vars[%r] = " % node.target)
-        if self.environment.is_async:
+        if self.environment.is_async: 
             self.write("await ")
         self.write("environment.get_template(")
-        self.visit(node.template, frame)
+        self.visit(node.template, frame) 
         self.write(", %r)." % self.name)
-        if node.with_context:
+        if node.with_context: 
             self.write(
                 "make_module%s(context.get_all(), True, %s)"
                 % (
@@ -992,23 +992,23 @@ class CodeGenerator(NodeVisitor):
                     self.dump_local_context(frame),
                 )
             )
-        elif self.environment.is_async:
+        elif self.environment.is_async: 
             self.write("_get_default_module_async()")
-        else:
+        else: 
             self.write("_get_default_module()")
         if frame.toplevel and not node.target.startswith("_"):
             self.writeline("context.exported_vars.discard(%r)" % node.target)
-
-    def visit_FromImport(self, node, frame):
-        """Visit named imports."""
-        self.newline(node)
+ 
+    def visit_FromImport(self, node, frame): 
+        """Visit named imports.""" 
+        self.newline(node) 
         self.write(
             "included_template = %senvironment.get_template("
             % (self.environment.is_async and "await " or "")
         )
-        self.visit(node.template, frame)
+        self.visit(node.template, frame) 
         self.write(", %r)." % self.name)
-        if node.with_context:
+        if node.with_context: 
             self.write(
                 "make_module%s(context.get_all(), True, %s)"
                 % (
@@ -1016,24 +1016,24 @@ class CodeGenerator(NodeVisitor):
                     self.dump_local_context(frame),
                 )
             )
-        elif self.environment.is_async:
+        elif self.environment.is_async: 
             self.write("_get_default_module_async()")
-        else:
+        else: 
             self.write("_get_default_module()")
-
-        var_names = []
-        discarded_names = []
-        for name in node.names:
-            if isinstance(name, tuple):
-                name, alias = name
-            else:
-                alias = name
+ 
+        var_names = [] 
+        discarded_names = [] 
+        for name in node.names: 
+            if isinstance(name, tuple): 
+                name, alias = name 
+            else: 
+                alias = name 
             self.writeline(
                 "%s = getattr(included_template, "
                 "%r, missing)" % (frame.symbols.ref(alias), name)
             )
             self.writeline("if %s is missing:" % frame.symbols.ref(alias))
-            self.indent()
+            self.indent() 
             self.writeline(
                 "%s = undefined(%r %% "
                 "included_template.__name__, "
@@ -1046,241 +1046,241 @@ class CodeGenerator(NodeVisitor):
                     name,
                 )
             )
-            self.outdent()
-            if frame.toplevel:
-                var_names.append(alias)
+            self.outdent() 
+            if frame.toplevel: 
+                var_names.append(alias) 
                 if not alias.startswith("_"):
-                    discarded_names.append(alias)
-
-        if var_names:
-            if len(var_names) == 1:
-                name = var_names[0]
+                    discarded_names.append(alias) 
+ 
+        if var_names: 
+            if len(var_names) == 1: 
+                name = var_names[0] 
                 self.writeline(
                     "context.vars[%r] = %s" % (name, frame.symbols.ref(name))
                 )
-            else:
+            else: 
                 self.writeline(
                     "context.vars.update({%s})"
                     % ", ".join(
                         "%r: %s" % (name, frame.symbols.ref(name)) for name in var_names
                     )
                 )
-        if discarded_names:
-            if len(discarded_names) == 1:
+        if discarded_names: 
+            if len(discarded_names) == 1: 
                 self.writeline("context.exported_vars.discard(%r)" % discarded_names[0])
-            else:
+            else: 
                 self.writeline(
                     "context.exported_vars.difference_"
                     "update((%s))" % ", ".join(imap(repr, discarded_names))
                 )
-
-    def visit_For(self, node, frame):
-        loop_frame = frame.inner()
-        test_frame = frame.inner()
-        else_frame = frame.inner()
-
-        # try to figure out if we have an extended loop.  An extended loop
-        # is necessary if the loop is in recursive mode if the special loop
-        # variable is accessed in the body.
+ 
+    def visit_For(self, node, frame): 
+        loop_frame = frame.inner() 
+        test_frame = frame.inner() 
+        else_frame = frame.inner() 
+ 
+        # try to figure out if we have an extended loop.  An extended loop 
+        # is necessary if the loop is in recursive mode if the special loop 
+        # variable is accessed in the body. 
         extended_loop = node.recursive or "loop" in find_undeclared(
             node.iter_child_nodes(only=("body",)), ("loop",)
         )
-
-        loop_ref = None
-        if extended_loop:
+ 
+        loop_ref = None 
+        if extended_loop: 
             loop_ref = loop_frame.symbols.declare_parameter("loop")
-
+ 
         loop_frame.symbols.analyze_node(node, for_branch="body")
-        if node.else_:
+        if node.else_: 
             else_frame.symbols.analyze_node(node, for_branch="else")
-
-        if node.test:
-            loop_filter_func = self.temporary_identifier()
+ 
+        if node.test: 
+            loop_filter_func = self.temporary_identifier() 
             test_frame.symbols.analyze_node(node, for_branch="test")
             self.writeline("%s(fiter):" % self.func(loop_filter_func), node.test)
-            self.indent()
-            self.enter_frame(test_frame)
+            self.indent() 
+            self.enter_frame(test_frame) 
             self.writeline(self.environment.is_async and "async for " or "for ")
-            self.visit(node.target, loop_frame)
+            self.visit(node.target, loop_frame) 
             self.write(" in ")
             self.write(self.environment.is_async and "auto_aiter(fiter)" or "fiter")
             self.write(":")
-            self.indent()
+            self.indent() 
             self.writeline("if ", node.test)
-            self.visit(node.test, test_frame)
+            self.visit(node.test, test_frame) 
             self.write(":")
-            self.indent()
+            self.indent() 
             self.writeline("yield ")
-            self.visit(node.target, loop_frame)
-            self.outdent(3)
-            self.leave_frame(test_frame, with_python_scope=True)
-
-        # if we don't have an recursive loop we have to find the shadowed
-        # variables at that point.  Because loops can be nested but the loop
-        # variable is a special one we have to enforce aliasing for it.
-        if node.recursive:
+            self.visit(node.target, loop_frame) 
+            self.outdent(3) 
+            self.leave_frame(test_frame, with_python_scope=True) 
+ 
+        # if we don't have an recursive loop we have to find the shadowed 
+        # variables at that point.  Because loops can be nested but the loop 
+        # variable is a special one we have to enforce aliasing for it. 
+        if node.recursive: 
             self.writeline(
                 "%s(reciter, loop_render_func, depth=0):" % self.func("loop"), node
             )
-            self.indent()
-            self.buffer(loop_frame)
-
-            # Use the same buffer for the else frame
-            else_frame.buffer = loop_frame.buffer
-
-        # make sure the loop variable is a special one and raise a template
-        # assertion error if a loop tries to write to loop
-        if extended_loop:
+            self.indent() 
+            self.buffer(loop_frame) 
+ 
+            # Use the same buffer for the else frame 
+            else_frame.buffer = loop_frame.buffer 
+ 
+        # make sure the loop variable is a special one and raise a template 
+        # assertion error if a loop tries to write to loop 
+        if extended_loop: 
             self.writeline("%s = missing" % loop_ref)
-
-        for name in node.find_all(nodes.Name):
+ 
+        for name in node.find_all(nodes.Name): 
             if name.ctx == "store" and name.name == "loop":
                 self.fail(
                     "Can't assign to special loop variable in for-loop target",
                     name.lineno,
                 )
-
-        if node.else_:
-            iteration_indicator = self.temporary_identifier()
+ 
+        if node.else_: 
+            iteration_indicator = self.temporary_identifier() 
             self.writeline("%s = 1" % iteration_indicator)
-
+ 
         self.writeline(self.environment.is_async and "async for " or "for ", node)
-        self.visit(node.target, loop_frame)
-        if extended_loop:
-            if self.environment.is_async:
+        self.visit(node.target, loop_frame) 
+        if extended_loop: 
+            if self.environment.is_async: 
                 self.write(", %s in AsyncLoopContext(" % loop_ref)
-            else:
+            else: 
                 self.write(", %s in LoopContext(" % loop_ref)
-        else:
+        else: 
             self.write(" in ")
-
-        if node.test:
+ 
+        if node.test: 
             self.write("%s(" % loop_filter_func)
-        if node.recursive:
+        if node.recursive: 
             self.write("reciter")
-        else:
-            if self.environment.is_async and not extended_loop:
+        else: 
+            if self.environment.is_async and not extended_loop: 
                 self.write("auto_aiter(")
-            self.visit(node.iter, frame)
-            if self.environment.is_async and not extended_loop:
+            self.visit(node.iter, frame) 
+            if self.environment.is_async and not extended_loop: 
                 self.write(")")
-        if node.test:
+        if node.test: 
             self.write(")")
-
-        if node.recursive:
+ 
+        if node.recursive: 
             self.write(", undefined, loop_render_func, depth):")
-        else:
+        else: 
             self.write(extended_loop and ", undefined):" or ":")
-
-        self.indent()
-        self.enter_frame(loop_frame)
-
-        self.blockvisit(node.body, loop_frame)
-        if node.else_:
+ 
+        self.indent() 
+        self.enter_frame(loop_frame) 
+ 
+        self.blockvisit(node.body, loop_frame) 
+        if node.else_: 
             self.writeline("%s = 0" % iteration_indicator)
-        self.outdent()
+        self.outdent() 
         self.leave_frame(
             loop_frame, with_python_scope=node.recursive and not node.else_
         )
-
-        if node.else_:
+ 
+        if node.else_: 
             self.writeline("if %s:" % iteration_indicator)
-            self.indent()
-            self.enter_frame(else_frame)
-            self.blockvisit(node.else_, else_frame)
-            self.leave_frame(else_frame)
-            self.outdent()
-
-        # if the node was recursive we have to return the buffer contents
-        # and start the iteration code
-        if node.recursive:
-            self.return_buffer_contents(loop_frame)
-            self.outdent()
-            self.start_write(frame, node)
-            if self.environment.is_async:
+            self.indent() 
+            self.enter_frame(else_frame) 
+            self.blockvisit(node.else_, else_frame) 
+            self.leave_frame(else_frame) 
+            self.outdent() 
+ 
+        # if the node was recursive we have to return the buffer contents 
+        # and start the iteration code 
+        if node.recursive: 
+            self.return_buffer_contents(loop_frame) 
+            self.outdent() 
+            self.start_write(frame, node) 
+            if self.environment.is_async: 
                 self.write("await ")
             self.write("loop(")
-            if self.environment.is_async:
+            if self.environment.is_async: 
                 self.write("auto_aiter(")
-            self.visit(node.iter, frame)
-            if self.environment.is_async:
+            self.visit(node.iter, frame) 
+            if self.environment.is_async: 
                 self.write(")")
             self.write(", loop)")
-            self.end_write(frame)
-
-    def visit_If(self, node, frame):
-        if_frame = frame.soft()
+            self.end_write(frame) 
+ 
+    def visit_If(self, node, frame): 
+        if_frame = frame.soft() 
         self.writeline("if ", node)
-        self.visit(node.test, if_frame)
+        self.visit(node.test, if_frame) 
         self.write(":")
-        self.indent()
-        self.blockvisit(node.body, if_frame)
-        self.outdent()
-        for elif_ in node.elif_:
+        self.indent() 
+        self.blockvisit(node.body, if_frame) 
+        self.outdent() 
+        for elif_ in node.elif_: 
             self.writeline("elif ", elif_)
-            self.visit(elif_.test, if_frame)
+            self.visit(elif_.test, if_frame) 
             self.write(":")
-            self.indent()
-            self.blockvisit(elif_.body, if_frame)
-            self.outdent()
-        if node.else_:
+            self.indent() 
+            self.blockvisit(elif_.body, if_frame) 
+            self.outdent() 
+        if node.else_: 
             self.writeline("else:")
-            self.indent()
-            self.blockvisit(node.else_, if_frame)
-            self.outdent()
-
-    def visit_Macro(self, node, frame):
-        macro_frame, macro_ref = self.macro_body(node, frame)
-        self.newline()
-        if frame.toplevel:
+            self.indent() 
+            self.blockvisit(node.else_, if_frame) 
+            self.outdent() 
+ 
+    def visit_Macro(self, node, frame): 
+        macro_frame, macro_ref = self.macro_body(node, frame) 
+        self.newline() 
+        if frame.toplevel: 
             if not node.name.startswith("_"):
                 self.write("context.exported_vars.add(%r)" % node.name)
             self.writeline("context.vars[%r] = " % node.name)
         self.write("%s = " % frame.symbols.ref(node.name))
-        self.macro_def(macro_ref, macro_frame)
-
-    def visit_CallBlock(self, node, frame):
-        call_frame, macro_ref = self.macro_body(node, frame)
+        self.macro_def(macro_ref, macro_frame) 
+ 
+    def visit_CallBlock(self, node, frame): 
+        call_frame, macro_ref = self.macro_body(node, frame) 
         self.writeline("caller = ")
-        self.macro_def(macro_ref, call_frame)
-        self.start_write(frame, node)
-        self.visit_Call(node.call, frame, forward_caller=True)
-        self.end_write(frame)
-
-    def visit_FilterBlock(self, node, frame):
-        filter_frame = frame.inner()
-        filter_frame.symbols.analyze_node(node)
-        self.enter_frame(filter_frame)
-        self.buffer(filter_frame)
-        self.blockvisit(node.body, filter_frame)
-        self.start_write(frame, node)
-        self.visit_Filter(node.filter, filter_frame)
-        self.end_write(frame)
-        self.leave_frame(filter_frame)
-
-    def visit_With(self, node, frame):
-        with_frame = frame.inner()
-        with_frame.symbols.analyze_node(node)
-        self.enter_frame(with_frame)
+        self.macro_def(macro_ref, call_frame) 
+        self.start_write(frame, node) 
+        self.visit_Call(node.call, frame, forward_caller=True) 
+        self.end_write(frame) 
+ 
+    def visit_FilterBlock(self, node, frame): 
+        filter_frame = frame.inner() 
+        filter_frame.symbols.analyze_node(node) 
+        self.enter_frame(filter_frame) 
+        self.buffer(filter_frame) 
+        self.blockvisit(node.body, filter_frame) 
+        self.start_write(frame, node) 
+        self.visit_Filter(node.filter, filter_frame) 
+        self.end_write(frame) 
+        self.leave_frame(filter_frame) 
+ 
+    def visit_With(self, node, frame): 
+        with_frame = frame.inner() 
+        with_frame.symbols.analyze_node(node) 
+        self.enter_frame(with_frame) 
         for target, expr in izip(node.targets, node.values):
-            self.newline()
-            self.visit(target, with_frame)
+            self.newline() 
+            self.visit(target, with_frame) 
             self.write(" = ")
-            self.visit(expr, frame)
-        self.blockvisit(node.body, with_frame)
-        self.leave_frame(with_frame)
-
-    def visit_ExprStmt(self, node, frame):
-        self.newline(node)
-        self.visit(node.node, frame)
-
+            self.visit(expr, frame) 
+        self.blockvisit(node.body, with_frame) 
+        self.leave_frame(with_frame) 
+ 
+    def visit_ExprStmt(self, node, frame): 
+        self.newline(node) 
+        self.visit(node.node, frame) 
+ 
     _FinalizeInfo = namedtuple("_FinalizeInfo", ("const", "src"))
     #: The default finalize function if the environment isn't configured
     #: with one. Or if the environment has one, this is called on that
     #: function's output for constants.
     _default_finalize = text_type
     _finalize = None
-
+ 
     def _make_finalize(self):
         """Build the finalize function to be used on constants and at
         runtime. Cached so it's only created once for all output nodes.
@@ -1300,7 +1300,7 @@ class CodeGenerator(NodeVisitor):
         finalize = default = self._default_finalize
         src = None
 
-        if self.environment.finalize:
+        if self.environment.finalize: 
             src = "environment.finalize("
             env_finalize = self.environment.finalize
 
@@ -1356,9 +1356,9 @@ class CodeGenerator(NodeVisitor):
             self.write("(escape if context.eval_ctx.autoescape else to_string)(")
         elif frame.eval_ctx.autoescape:
             self.write("escape(")
-        else:
+        else: 
             self.write("to_string(")
-
+ 
         if finalize.src is not None:
             self.write(finalize.src)
 
@@ -1373,22 +1373,22 @@ class CodeGenerator(NodeVisitor):
 
     def visit_Output(self, node, frame):
         # If an extends is active, don't render outside a block.
-        if frame.require_output_check:
+        if frame.require_output_check: 
             # A top-level extends is known to exist at compile time.
             if self.has_known_extends:
                 return
 
             self.writeline("if parent_template is None:")
-            self.indent()
-
+            self.indent() 
+ 
         finalize = self._make_finalize()
-        body = []
+        body = [] 
 
         # Evaluate constants at compile time if possible. Each item in
         # body will be either a list of static data or a node to be
         # evaluated at runtime.
-        for child in node.nodes:
-            try:
+        for child in node.nodes: 
+            try: 
                 if not (
                     # If the finalize function requires runtime context,
                     # constants can't be evaluated at compile time.
@@ -1397,21 +1397,21 @@ class CodeGenerator(NodeVisitor):
                     # finalized anyway.
                     or isinstance(child, nodes.TemplateData)
                 ):
-                    raise nodes.Impossible()
+                    raise nodes.Impossible() 
 
                 const = self._output_child_to_const(child, frame, finalize)
             except (nodes.Impossible, Exception):
                 # The node was not constant and needs to be evaluated at
                 # runtime. Or another error was raised, which is easier
                 # to debug at runtime.
-                body.append(child)
-                continue
-
-            if body and isinstance(body[-1], list):
-                body[-1].append(const)
-            else:
-                body.append([const])
-
+                body.append(child) 
+                continue 
+
+            if body and isinstance(body[-1], list): 
+                body[-1].append(const) 
+            else: 
+                body.append([const]) 
+ 
         if frame.buffer is not None:
             if len(body) == 1:
                 self.writeline("%s.append(" % frame.buffer)
@@ -1427,14 +1427,14 @@ class CodeGenerator(NodeVisitor):
 
                 if frame.buffer is None:
                     self.writeline("yield " + val)
-                else:
+                else: 
                     self.writeline(val + ",")
             else:
                 if frame.buffer is None:
                     self.writeline("yield ", item)
-                else:
+                else: 
                     self.newline(item)
-
+ 
                 # A node to be evaluated at runtime.
                 self._output_child_pre(item, frame, finalize)
                 self.visit(item, frame)
@@ -1444,55 +1444,55 @@ class CodeGenerator(NodeVisitor):
                     self.write(",")
 
         if frame.buffer is not None:
-            self.outdent()
+            self.outdent() 
             self.writeline(")" if len(body) == 1 else "))")
-
+ 
         if frame.require_output_check:
-            self.outdent()
-
-    def visit_Assign(self, node, frame):
-        self.push_assign_tracking()
-        self.newline(node)
-        self.visit(node.target, frame)
+            self.outdent() 
+ 
+    def visit_Assign(self, node, frame): 
+        self.push_assign_tracking() 
+        self.newline(node) 
+        self.visit(node.target, frame) 
         self.write(" = ")
-        self.visit(node.node, frame)
-        self.pop_assign_tracking(frame)
-
-    def visit_AssignBlock(self, node, frame):
-        self.push_assign_tracking()
-        block_frame = frame.inner()
-        # This is a special case.  Since a set block always captures we
-        # will disable output checks.  This way one can use set blocks
-        # toplevel even in extended templates.
-        block_frame.require_output_check = False
-        block_frame.symbols.analyze_node(node)
-        self.enter_frame(block_frame)
-        self.buffer(block_frame)
-        self.blockvisit(node.body, block_frame)
-        self.newline(node)
-        self.visit(node.target, frame)
+        self.visit(node.node, frame) 
+        self.pop_assign_tracking(frame) 
+ 
+    def visit_AssignBlock(self, node, frame): 
+        self.push_assign_tracking() 
+        block_frame = frame.inner() 
+        # This is a special case.  Since a set block always captures we 
+        # will disable output checks.  This way one can use set blocks 
+        # toplevel even in extended templates. 
+        block_frame.require_output_check = False 
+        block_frame.symbols.analyze_node(node) 
+        self.enter_frame(block_frame) 
+        self.buffer(block_frame) 
+        self.blockvisit(node.body, block_frame) 
+        self.newline(node) 
+        self.visit(node.target, frame) 
         self.write(" = (Markup if context.eval_ctx.autoescape else identity)(")
-        if node.filter is not None:
-            self.visit_Filter(node.filter, block_frame)
-        else:
+        if node.filter is not None: 
+            self.visit_Filter(node.filter, block_frame) 
+        else: 
             self.write("concat(%s)" % block_frame.buffer)
         self.write(")")
-        self.pop_assign_tracking(frame)
-        self.leave_frame(block_frame)
-
-    # -- Expression Visitors
-
-    def visit_Name(self, node, frame):
+        self.pop_assign_tracking(frame) 
+        self.leave_frame(block_frame) 
+ 
+    # -- Expression Visitors 
+ 
+    def visit_Name(self, node, frame): 
         if node.ctx == "store" and frame.toplevel:
-            if self._assign_stack:
-                self._assign_stack[-1].add(node.name)
-        ref = frame.symbols.ref(node.name)
-
-        # If we are looking up a variable we might have to deal with the
-        # case where it's undefined.  We can skip that case if the load
-        # instruction indicates a parameter which are always defined.
+            if self._assign_stack: 
+                self._assign_stack[-1].add(node.name) 
+        ref = frame.symbols.ref(node.name) 
+ 
+        # If we are looking up a variable we might have to deal with the 
+        # case where it's undefined.  We can skip that case if the load 
+        # instruction indicates a parameter which are always defined. 
         if node.ctx == "load":
-            load = frame.symbols.find_load(ref)
+            load = frame.symbols.find_load(ref) 
             if not (
                 load is not None
                 and load[0] == VAR_LOAD_PARAMETER
@@ -1502,102 +1502,102 @@ class CodeGenerator(NodeVisitor):
                     "(undefined(name=%r) if %s is missing else %s)"
                     % (node.name, ref, ref)
                 )
-                return
-
-        self.write(ref)
-
-    def visit_NSRef(self, node, frame):
-        # NSRefs can only be used to store values; since they use the normal
-        # `foo.bar` notation they will be parsed as a normal attribute access
-        # when used anywhere but in a `set` context
-        ref = frame.symbols.ref(node.name)
+                return 
+ 
+        self.write(ref) 
+ 
+    def visit_NSRef(self, node, frame): 
+        # NSRefs can only be used to store values; since they use the normal 
+        # `foo.bar` notation they will be parsed as a normal attribute access 
+        # when used anywhere but in a `set` context 
+        ref = frame.symbols.ref(node.name) 
         self.writeline("if not isinstance(%s, Namespace):" % ref)
-        self.indent()
+        self.indent() 
         self.writeline(
             "raise TemplateRuntimeError(%r)"
             % "cannot assign attribute on non-namespace object"
         )
-        self.outdent()
+        self.outdent() 
         self.writeline("%s[%r]" % (ref, node.attr))
-
-    def visit_Const(self, node, frame):
-        val = node.as_const(frame.eval_ctx)
-        if isinstance(val, float):
-            self.write(str(val))
-        else:
-            self.write(repr(val))
-
-    def visit_TemplateData(self, node, frame):
-        try:
-            self.write(repr(node.as_const(frame.eval_ctx)))
-        except nodes.Impossible:
+ 
+    def visit_Const(self, node, frame): 
+        val = node.as_const(frame.eval_ctx) 
+        if isinstance(val, float): 
+            self.write(str(val)) 
+        else: 
+            self.write(repr(val)) 
+ 
+    def visit_TemplateData(self, node, frame): 
+        try: 
+            self.write(repr(node.as_const(frame.eval_ctx))) 
+        except nodes.Impossible: 
             self.write(
                 "(Markup if context.eval_ctx.autoescape else identity)(%r)" % node.data
             )
-
-    def visit_Tuple(self, node, frame):
+ 
+    def visit_Tuple(self, node, frame): 
         self.write("(")
-        idx = -1
-        for idx, item in enumerate(node.items):
-            if idx:
+        idx = -1 
+        for idx, item in enumerate(node.items): 
+            if idx: 
                 self.write(", ")
-            self.visit(item, frame)
+            self.visit(item, frame) 
         self.write(idx == 0 and ",)" or ")")
-
-    def visit_List(self, node, frame):
+ 
+    def visit_List(self, node, frame): 
         self.write("[")
-        for idx, item in enumerate(node.items):
-            if idx:
+        for idx, item in enumerate(node.items): 
+            if idx: 
                 self.write(", ")
-            self.visit(item, frame)
+            self.visit(item, frame) 
         self.write("]")
-
-    def visit_Dict(self, node, frame):
+ 
+    def visit_Dict(self, node, frame): 
         self.write("{")
-        for idx, item in enumerate(node.items):
-            if idx:
+        for idx, item in enumerate(node.items): 
+            if idx: 
                 self.write(", ")
-            self.visit(item.key, frame)
+            self.visit(item.key, frame) 
             self.write(": ")
-            self.visit(item.value, frame)
+            self.visit(item.value, frame) 
         self.write("}")
-
+ 
     def binop(operator, interceptable=True):  # noqa: B902
-        @optimizeconst
-        def visitor(self, node, frame):
+        @optimizeconst 
+        def visitor(self, node, frame): 
             if (
                 self.environment.sandboxed
                 and operator in self.environment.intercepted_binops
             ):
                 self.write("environment.call_binop(context, %r, " % operator)
-                self.visit(node.left, frame)
+                self.visit(node.left, frame) 
                 self.write(", ")
-                self.visit(node.right, frame)
-            else:
+                self.visit(node.right, frame) 
+            else: 
                 self.write("(")
-                self.visit(node.left, frame)
+                self.visit(node.left, frame) 
                 self.write(" %s " % operator)
-                self.visit(node.right, frame)
+                self.visit(node.right, frame) 
             self.write(")")
 
-        return visitor
-
+        return visitor 
+ 
     def uaop(operator, interceptable=True):  # noqa: B902
-        @optimizeconst
-        def visitor(self, node, frame):
+        @optimizeconst 
+        def visitor(self, node, frame): 
             if (
                 self.environment.sandboxed
                 and operator in self.environment.intercepted_unops
             ):
                 self.write("environment.call_unop(context, %r, " % operator)
-                self.visit(node.node, frame)
-            else:
+                self.visit(node.node, frame) 
+            else: 
                 self.write("(" + operator)
-                self.visit(node.node, frame)
+                self.visit(node.node, frame) 
             self.write(")")
 
-        return visitor
-
+        return visitor 
+ 
     visit_Add = binop("+")
     visit_Sub = binop("-")
     visit_Mul = binop("*")
@@ -1610,84 +1610,84 @@ class CodeGenerator(NodeVisitor):
     visit_Pos = uaop("+")
     visit_Neg = uaop("-")
     visit_Not = uaop("not ", interceptable=False)
-    del binop, uaop
-
-    @optimizeconst
-    def visit_Concat(self, node, frame):
-        if frame.eval_ctx.volatile:
+    del binop, uaop 
+ 
+    @optimizeconst 
+    def visit_Concat(self, node, frame): 
+        if frame.eval_ctx.volatile: 
             func_name = "(context.eval_ctx.volatile and markup_join or unicode_join)"
-        elif frame.eval_ctx.autoescape:
+        elif frame.eval_ctx.autoescape: 
             func_name = "markup_join"
-        else:
+        else: 
             func_name = "unicode_join"
         self.write("%s((" % func_name)
-        for arg in node.nodes:
-            self.visit(arg, frame)
+        for arg in node.nodes: 
+            self.visit(arg, frame) 
             self.write(", ")
         self.write("))")
-
-    @optimizeconst
-    def visit_Compare(self, node, frame):
+ 
+    @optimizeconst 
+    def visit_Compare(self, node, frame): 
         self.write("(")
-        self.visit(node.expr, frame)
-        for op in node.ops:
-            self.visit(op, frame)
+        self.visit(node.expr, frame) 
+        for op in node.ops: 
+            self.visit(op, frame) 
         self.write(")")
-
-    def visit_Operand(self, node, frame):
+ 
+    def visit_Operand(self, node, frame): 
         self.write(" %s " % operators[node.op])
-        self.visit(node.expr, frame)
-
-    @optimizeconst
-    def visit_Getattr(self, node, frame):
+        self.visit(node.expr, frame) 
+ 
+    @optimizeconst 
+    def visit_Getattr(self, node, frame): 
         if self.environment.is_async:
             self.write("(await auto_await(")
 
         self.write("environment.getattr(")
-        self.visit(node.node, frame)
+        self.visit(node.node, frame) 
         self.write(", %r)" % node.attr)
-
+ 
         if self.environment.is_async:
             self.write("))")
 
-    @optimizeconst
-    def visit_Getitem(self, node, frame):
-        # slices bypass the environment getitem method.
-        if isinstance(node.arg, nodes.Slice):
-            self.visit(node.node, frame)
+    @optimizeconst 
+    def visit_Getitem(self, node, frame): 
+        # slices bypass the environment getitem method. 
+        if isinstance(node.arg, nodes.Slice): 
+            self.visit(node.node, frame) 
             self.write("[")
-            self.visit(node.arg, frame)
+            self.visit(node.arg, frame) 
             self.write("]")
-        else:
+        else: 
             if self.environment.is_async:
                 self.write("(await auto_await(")
 
             self.write("environment.getitem(")
-            self.visit(node.node, frame)
+            self.visit(node.node, frame) 
             self.write(", ")
-            self.visit(node.arg, frame)
+            self.visit(node.arg, frame) 
             self.write(")")
-
+ 
             if self.environment.is_async:
                 self.write("))")
 
-    def visit_Slice(self, node, frame):
-        if node.start is not None:
-            self.visit(node.start, frame)
+    def visit_Slice(self, node, frame): 
+        if node.start is not None: 
+            self.visit(node.start, frame) 
         self.write(":")
-        if node.stop is not None:
-            self.visit(node.stop, frame)
-        if node.step is not None:
+        if node.stop is not None: 
+            self.visit(node.stop, frame) 
+        if node.step is not None: 
             self.write(":")
-            self.visit(node.step, frame)
-
-    @optimizeconst
-    def visit_Filter(self, node, frame):
-        if self.environment.is_async:
+            self.visit(node.step, frame) 
+ 
+    @optimizeconst 
+    def visit_Filter(self, node, frame): 
+        if self.environment.is_async: 
             self.write("await auto_await(")
         self.write(self.filters[node.name] + "(")
-        func = self.environment.filters.get(node.name)
-        if func is None:
+        func = self.environment.filters.get(node.name) 
+        if func is None: 
             self.fail("no filter named %r" % node.name, node.lineno)
         if getattr(func, "contextfilter", False) is True:
             self.write("context, ")
@@ -1695,39 +1695,39 @@ class CodeGenerator(NodeVisitor):
             self.write("context.eval_ctx, ")
         elif getattr(func, "environmentfilter", False) is True:
             self.write("environment, ")
-
-        # if the filter node is None we are inside a filter block
-        # and want to write to the current buffer
-        if node.node is not None:
-            self.visit(node.node, frame)
-        elif frame.eval_ctx.volatile:
+ 
+        # if the filter node is None we are inside a filter block 
+        # and want to write to the current buffer 
+        if node.node is not None: 
+            self.visit(node.node, frame) 
+        elif frame.eval_ctx.volatile: 
             self.write(
                 "(context.eval_ctx.autoescape and"
                 " Markup(concat(%s)) or concat(%s))" % (frame.buffer, frame.buffer)
             )
-        elif frame.eval_ctx.autoescape:
+        elif frame.eval_ctx.autoescape: 
             self.write("Markup(concat(%s))" % frame.buffer)
-        else:
+        else: 
             self.write("concat(%s)" % frame.buffer)
-        self.signature(node, frame)
+        self.signature(node, frame) 
         self.write(")")
-        if self.environment.is_async:
+        if self.environment.is_async: 
             self.write(")")
-
-    @optimizeconst
-    def visit_Test(self, node, frame):
+ 
+    @optimizeconst 
+    def visit_Test(self, node, frame): 
         self.write(self.tests[node.name] + "(")
-        if node.name not in self.environment.tests:
+        if node.name not in self.environment.tests: 
             self.fail("no test named %r" % node.name, node.lineno)
-        self.visit(node.node, frame)
-        self.signature(node, frame)
+        self.visit(node.node, frame) 
+        self.signature(node, frame) 
         self.write(")")
-
-    @optimizeconst
-    def visit_CondExpr(self, node, frame):
-        def write_expr2():
-            if node.expr2 is not None:
-                return self.visit(node.expr2, frame)
+ 
+    @optimizeconst 
+    def visit_CondExpr(self, node, frame): 
+        def write_expr2(): 
+            if node.expr2 is not None: 
+                return self.visit(node.expr2, frame) 
             self.write(
                 "cond_expr_undefined(%r)"
                 % (
@@ -1736,108 +1736,108 @@ class CodeGenerator(NodeVisitor):
                     "no else section was defined." % self.position(node)
                 )
             )
-
+ 
         self.write("(")
-        self.visit(node.expr1, frame)
+        self.visit(node.expr1, frame) 
         self.write(" if ")
-        self.visit(node.test, frame)
+        self.visit(node.test, frame) 
         self.write(" else ")
-        write_expr2()
+        write_expr2() 
         self.write(")")
-
-    @optimizeconst
-    def visit_Call(self, node, frame, forward_caller=False):
-        if self.environment.is_async:
+ 
+    @optimizeconst 
+    def visit_Call(self, node, frame, forward_caller=False): 
+        if self.environment.is_async: 
             self.write("await auto_await(")
-        if self.environment.sandboxed:
+        if self.environment.sandboxed: 
             self.write("environment.call(context, ")
-        else:
+        else: 
             self.write("context.call(")
-        self.visit(node.node, frame)
+        self.visit(node.node, frame) 
         extra_kwargs = forward_caller and {"caller": "caller"} or None
-        self.signature(node, frame, extra_kwargs)
+        self.signature(node, frame, extra_kwargs) 
         self.write(")")
-        if self.environment.is_async:
+        if self.environment.is_async: 
             self.write(")")
-
-    def visit_Keyword(self, node, frame):
+ 
+    def visit_Keyword(self, node, frame): 
         self.write(node.key + "=")
-        self.visit(node.value, frame)
-
-    # -- Unused nodes for extensions
-
-    def visit_MarkSafe(self, node, frame):
+        self.visit(node.value, frame) 
+ 
+    # -- Unused nodes for extensions 
+ 
+    def visit_MarkSafe(self, node, frame): 
         self.write("Markup(")
-        self.visit(node.expr, frame)
+        self.visit(node.expr, frame) 
         self.write(")")
-
-    def visit_MarkSafeIfAutoescape(self, node, frame):
+ 
+    def visit_MarkSafeIfAutoescape(self, node, frame): 
         self.write("(context.eval_ctx.autoescape and Markup or identity)(")
-        self.visit(node.expr, frame)
+        self.visit(node.expr, frame) 
         self.write(")")
-
-    def visit_EnvironmentAttribute(self, node, frame):
+ 
+    def visit_EnvironmentAttribute(self, node, frame): 
         self.write("environment." + node.name)
-
-    def visit_ExtensionAttribute(self, node, frame):
+ 
+    def visit_ExtensionAttribute(self, node, frame): 
         self.write("environment.extensions[%r].%s" % (node.identifier, node.name))
-
-    def visit_ImportedName(self, node, frame):
-        self.write(self.import_aliases[node.importname])
-
-    def visit_InternalName(self, node, frame):
-        self.write(node.name)
-
-    def visit_ContextReference(self, node, frame):
+ 
+    def visit_ImportedName(self, node, frame): 
+        self.write(self.import_aliases[node.importname]) 
+ 
+    def visit_InternalName(self, node, frame): 
+        self.write(node.name) 
+ 
+    def visit_ContextReference(self, node, frame): 
         self.write("context")
-
+ 
     def visit_DerivedContextReference(self, node, frame):
         self.write(self.derive_context(frame))
 
-    def visit_Continue(self, node, frame):
+    def visit_Continue(self, node, frame): 
         self.writeline("continue", node)
-
-    def visit_Break(self, node, frame):
+ 
+    def visit_Break(self, node, frame): 
         self.writeline("break", node)
-
-    def visit_Scope(self, node, frame):
-        scope_frame = frame.inner()
-        scope_frame.symbols.analyze_node(node)
-        self.enter_frame(scope_frame)
-        self.blockvisit(node.body, scope_frame)
-        self.leave_frame(scope_frame)
-
-    def visit_OverlayScope(self, node, frame):
-        ctx = self.temporary_identifier()
+ 
+    def visit_Scope(self, node, frame): 
+        scope_frame = frame.inner() 
+        scope_frame.symbols.analyze_node(node) 
+        self.enter_frame(scope_frame) 
+        self.blockvisit(node.body, scope_frame) 
+        self.leave_frame(scope_frame) 
+ 
+    def visit_OverlayScope(self, node, frame): 
+        ctx = self.temporary_identifier() 
         self.writeline("%s = %s" % (ctx, self.derive_context(frame)))
         self.writeline("%s.vars = " % ctx)
-        self.visit(node.context, frame)
-        self.push_context_reference(ctx)
-
-        scope_frame = frame.inner(isolated=True)
-        scope_frame.symbols.analyze_node(node)
-        self.enter_frame(scope_frame)
-        self.blockvisit(node.body, scope_frame)
-        self.leave_frame(scope_frame)
-        self.pop_context_reference()
-
-    def visit_EvalContextModifier(self, node, frame):
-        for keyword in node.options:
+        self.visit(node.context, frame) 
+        self.push_context_reference(ctx) 
+ 
+        scope_frame = frame.inner(isolated=True) 
+        scope_frame.symbols.analyze_node(node) 
+        self.enter_frame(scope_frame) 
+        self.blockvisit(node.body, scope_frame) 
+        self.leave_frame(scope_frame) 
+        self.pop_context_reference() 
+ 
+    def visit_EvalContextModifier(self, node, frame): 
+        for keyword in node.options: 
             self.writeline("context.eval_ctx.%s = " % keyword.key)
-            self.visit(keyword.value, frame)
-            try:
-                val = keyword.value.as_const(frame.eval_ctx)
-            except nodes.Impossible:
-                frame.eval_ctx.volatile = True
-            else:
-                setattr(frame.eval_ctx, keyword.key, val)
-
-    def visit_ScopedEvalContextModifier(self, node, frame):
-        old_ctx_name = self.temporary_identifier()
-        saved_ctx = frame.eval_ctx.save()
+            self.visit(keyword.value, frame) 
+            try: 
+                val = keyword.value.as_const(frame.eval_ctx) 
+            except nodes.Impossible: 
+                frame.eval_ctx.volatile = True 
+            else: 
+                setattr(frame.eval_ctx, keyword.key, val) 
+ 
+    def visit_ScopedEvalContextModifier(self, node, frame): 
+        old_ctx_name = self.temporary_identifier() 
+        saved_ctx = frame.eval_ctx.save() 
         self.writeline("%s = context.eval_ctx.save()" % old_ctx_name)
-        self.visit_EvalContextModifier(node, frame)
-        for child in node.body:
-            self.visit(child, frame)
-        frame.eval_ctx.revert(saved_ctx)
+        self.visit_EvalContextModifier(node, frame) 
+        for child in node.body: 
+            self.visit(child, frame) 
+        frame.eval_ctx.revert(saved_ctx) 
         self.writeline("context.eval_ctx.revert(%s)" % old_ctx_name)