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

1 files changed, 798 insertions, 798 deletions

diff --git a/contrib/python/Jinja2/py3/jinja2/environment.py b/contrib/python/Jinja2/py3/jinja2/environment.py
index a231d9cd576..af6b6d9705c 100644
--- a/contrib/python/Jinja2/py3/jinja2/environment.py
+++ b/contrib/python/Jinja2/py3/jinja2/environment.py
@@ -1,19 +1,19 @@
 """Classes for managing templates and their runtime and compile time
 options.
-"""
-import os
-import sys
+""" 
+import os 
+import sys 
 import typing
 import typing as t
-import weakref
+import weakref 
 from collections import ChainMap
 from functools import lru_cache
 from functools import partial
 from functools import reduce
 from types import CodeType
-
+ 
 from markupsafe import Markup
-
+ 
 from . import nodes
 from .compiler import CodeGenerator
 from .compiler import generate
@@ -59,9 +59,9 @@ if t.TYPE_CHECKING:
     from .bccache import BytecodeCache
     from .ext import Extension
     from .loaders import BaseLoader
-
+ 
 _env_bound = t.TypeVar("_env_bound", bound="Environment")
-
+ 
 
 # for direct template usage we have up to ten living environments
 @lru_cache(maxsize=10)
@@ -69,61 +69,61 @@ def get_spontaneous_environment(cls: t.Type[_env_bound], *args: t.Any) -> _env_b
     """Return a new spontaneous environment. A spontaneous environment
     is used for templates created directly rather than through an
     existing environment.
-
+ 
     :param cls: Environment class to create.
     :param args: Positional arguments passed to environment.
-    """
+    """ 
     env = cls(*args)
     env.shared = True
     return env
 
-
+ 
 def create_cache(
     size: int,
 ) -> t.Optional[t.MutableMapping[t.Tuple[weakref.ref, str], "Template"]]:
-    """Return the cache class for the given size."""
-    if size == 0:
-        return None
-
-    if size < 0:
-        return {}
+    """Return the cache class for the given size.""" 
+    if size == 0: 
+        return None 
 
+    if size < 0: 
+        return {} 
+ 
     return LRUCache(size)  # type: ignore
-
+ 
 
 def copy_cache(
     cache: t.Optional[t.MutableMapping],
 ) -> t.Optional[t.MutableMapping[t.Tuple[weakref.ref, str], "Template"]]:
-    """Create an empty copy of the given cache."""
-    if cache is None:
-        return None
+    """Create an empty copy of the given cache.""" 
+    if cache is None: 
+        return None 
 
     if type(cache) is dict:
-        return {}
-
+        return {} 
+ 
     return LRUCache(cache.capacity)  # type: ignore
-
+ 
 
 def load_extensions(
     environment: "Environment",
     extensions: t.Sequence[t.Union[str, t.Type["Extension"]]],
 ) -> t.Dict[str, "Extension"]:
-    """Load the extensions from the list and bind it to the environment.
+    """Load the extensions from the list and bind it to the environment. 
     Returns a dict of instantiated extensions.
-    """
-    result = {}
+    """ 
+    result = {} 
 
-    for extension in extensions:
+    for extension in extensions: 
         if isinstance(extension, str):
             extension = t.cast(t.Type["Extension"], import_string(extension))
 
-        result[extension.identifier] = extension(environment)
-
-    return result
-
+        result[extension.identifier] = extension(environment) 
 
+    return result 
+ 
+ 
 def _environment_config_check(environment: "Environment") -> "Environment":
-    """Perform a sanity check on the environment."""
+    """Perform a sanity check on the environment.""" 
     assert issubclass(
         environment.undefined, Undefined
     ), "'undefined' must be a subclass of 'jinja2.Undefined'."
@@ -137,155 +137,155 @@ def _environment_config_check(environment: "Environment") -> "Environment":
         "\r\n",
         "\n",
     }, "'newline_sequence' must be one of '\\n', '\\r\\n', or '\\r'."
-    return environment
-
-
+    return environment 
+ 
+ 
 class Environment:
-    r"""The core component of Jinja is the `Environment`.  It contains
-    important shared variables like configuration, filters, tests,
-    globals and others.  Instances of this class may be modified if
-    they are not shared and if no template was loaded so far.
-    Modifications on environments after the first template was loaded
-    will lead to surprising effects and undefined behavior.
-
-    Here are the possible initialization parameters:
-
-        `block_start_string`
-            The string marking the beginning of a block.  Defaults to ``'{%'``.
-
-        `block_end_string`
-            The string marking the end of a block.  Defaults to ``'%}'``.
-
-        `variable_start_string`
-            The string marking the beginning of a print statement.
-            Defaults to ``'{{'``.
-
-        `variable_end_string`
-            The string marking the end of a print statement.  Defaults to
-            ``'}}'``.
-
-        `comment_start_string`
-            The string marking the beginning of a comment.  Defaults to ``'{#'``.
-
-        `comment_end_string`
-            The string marking the end of a comment.  Defaults to ``'#}'``.
-
-        `line_statement_prefix`
-            If given and a string, this will be used as prefix for line based
-            statements.  See also :ref:`line-statements`.
-
-        `line_comment_prefix`
-            If given and a string, this will be used as prefix for line based
-            comments.  See also :ref:`line-statements`.
-
-            .. versionadded:: 2.2
-
-        `trim_blocks`
-            If this is set to ``True`` the first newline after a block is
-            removed (block, not variable tag!).  Defaults to `False`.
-
-        `lstrip_blocks`
-            If this is set to ``True`` leading spaces and tabs are stripped
-            from the start of a line to a block.  Defaults to `False`.
-
-        `newline_sequence`
-            The sequence that starts a newline.  Must be one of ``'\r'``,
-            ``'\n'`` or ``'\r\n'``.  The default is ``'\n'`` which is a
-            useful default for Linux and OS X systems as well as web
-            applications.
-
-        `keep_trailing_newline`
-            Preserve the trailing newline when rendering templates.
-            The default is ``False``, which causes a single newline,
-            if present, to be stripped from the end of the template.
-
-            .. versionadded:: 2.7
-
-        `extensions`
-            List of Jinja extensions to use.  This can either be import paths
-            as strings or extension classes.  For more information have a
-            look at :ref:`the extensions documentation <jinja-extensions>`.
-
-        `optimized`
-            should the optimizer be enabled?  Default is ``True``.
-
-        `undefined`
-            :class:`Undefined` or a subclass of it that is used to represent
-            undefined values in the template.
-
-        `finalize`
-            A callable that can be used to process the result of a variable
-            expression before it is output.  For example one can convert
-            ``None`` implicitly into an empty string here.
-
-        `autoescape`
-            If set to ``True`` the XML/HTML autoescaping feature is enabled by
-            default.  For more details about autoescaping see
+    r"""The core component of Jinja is the `Environment`.  It contains 
+    important shared variables like configuration, filters, tests, 
+    globals and others.  Instances of this class may be modified if 
+    they are not shared and if no template was loaded so far. 
+    Modifications on environments after the first template was loaded 
+    will lead to surprising effects and undefined behavior. 
+ 
+    Here are the possible initialization parameters: 
+ 
+        `block_start_string` 
+            The string marking the beginning of a block.  Defaults to ``'{%'``. 
+ 
+        `block_end_string` 
+            The string marking the end of a block.  Defaults to ``'%}'``. 
+ 
+        `variable_start_string` 
+            The string marking the beginning of a print statement. 
+            Defaults to ``'{{'``. 
+ 
+        `variable_end_string` 
+            The string marking the end of a print statement.  Defaults to 
+            ``'}}'``. 
+ 
+        `comment_start_string` 
+            The string marking the beginning of a comment.  Defaults to ``'{#'``. 
+ 
+        `comment_end_string` 
+            The string marking the end of a comment.  Defaults to ``'#}'``. 
+ 
+        `line_statement_prefix` 
+            If given and a string, this will be used as prefix for line based 
+            statements.  See also :ref:`line-statements`. 
+ 
+        `line_comment_prefix` 
+            If given and a string, this will be used as prefix for line based 
+            comments.  See also :ref:`line-statements`. 
+ 
+            .. versionadded:: 2.2 
+ 
+        `trim_blocks` 
+            If this is set to ``True`` the first newline after a block is 
+            removed (block, not variable tag!).  Defaults to `False`. 
+ 
+        `lstrip_blocks` 
+            If this is set to ``True`` leading spaces and tabs are stripped 
+            from the start of a line to a block.  Defaults to `False`. 
+ 
+        `newline_sequence` 
+            The sequence that starts a newline.  Must be one of ``'\r'``, 
+            ``'\n'`` or ``'\r\n'``.  The default is ``'\n'`` which is a 
+            useful default for Linux and OS X systems as well as web 
+            applications. 
+ 
+        `keep_trailing_newline` 
+            Preserve the trailing newline when rendering templates. 
+            The default is ``False``, which causes a single newline, 
+            if present, to be stripped from the end of the template. 
+ 
+            .. versionadded:: 2.7 
+ 
+        `extensions` 
+            List of Jinja extensions to use.  This can either be import paths 
+            as strings or extension classes.  For more information have a 
+            look at :ref:`the extensions documentation <jinja-extensions>`. 
+ 
+        `optimized` 
+            should the optimizer be enabled?  Default is ``True``. 
+ 
+        `undefined` 
+            :class:`Undefined` or a subclass of it that is used to represent 
+            undefined values in the template. 
+ 
+        `finalize` 
+            A callable that can be used to process the result of a variable 
+            expression before it is output.  For example one can convert 
+            ``None`` implicitly into an empty string here. 
+ 
+        `autoescape` 
+            If set to ``True`` the XML/HTML autoescaping feature is enabled by 
+            default.  For more details about autoescaping see 
             :class:`~markupsafe.Markup`.  As of Jinja 2.4 this can also
-            be a callable that is passed the template name and has to
-            return ``True`` or ``False`` depending on autoescape should be
-            enabled by default.
-
-            .. versionchanged:: 2.4
-               `autoescape` can now be a function
-
-        `loader`
-            The template loader for this environment.
-
-        `cache_size`
-            The size of the cache.  Per default this is ``400`` which means
-            that if more than 400 templates are loaded the loader will clean
-            out the least recently used template.  If the cache size is set to
-            ``0`` templates are recompiled all the time, if the cache size is
-            ``-1`` the cache will not be cleaned.
-
-            .. versionchanged:: 2.8
-               The cache size was increased to 400 from a low 50.
-
-        `auto_reload`
-            Some loaders load templates from locations where the template
-            sources may change (ie: file system or database).  If
-            ``auto_reload`` is set to ``True`` (default) every time a template is
-            requested the loader checks if the source changed and if yes, it
-            will reload the template.  For higher performance it's possible to
-            disable that.
-
-        `bytecode_cache`
-            If set to a bytecode cache object, this object will provide a
-            cache for the internal Jinja bytecode so that templates don't
-            have to be parsed if they were not changed.
-
-            See :ref:`bytecode-cache` for more information.
-
-        `enable_async`
+            be a callable that is passed the template name and has to 
+            return ``True`` or ``False`` depending on autoescape should be 
+            enabled by default. 
+ 
+            .. versionchanged:: 2.4 
+               `autoescape` can now be a function 
+ 
+        `loader` 
+            The template loader for this environment. 
+ 
+        `cache_size` 
+            The size of the cache.  Per default this is ``400`` which means 
+            that if more than 400 templates are loaded the loader will clean 
+            out the least recently used template.  If the cache size is set to 
+            ``0`` templates are recompiled all the time, if the cache size is 
+            ``-1`` the cache will not be cleaned. 
+ 
+            .. versionchanged:: 2.8 
+               The cache size was increased to 400 from a low 50. 
+ 
+        `auto_reload` 
+            Some loaders load templates from locations where the template 
+            sources may change (ie: file system or database).  If 
+            ``auto_reload`` is set to ``True`` (default) every time a template is 
+            requested the loader checks if the source changed and if yes, it 
+            will reload the template.  For higher performance it's possible to 
+            disable that. 
+ 
+        `bytecode_cache` 
+            If set to a bytecode cache object, this object will provide a 
+            cache for the internal Jinja bytecode so that templates don't 
+            have to be parsed if they were not changed. 
+ 
+            See :ref:`bytecode-cache` for more information. 
+ 
+        `enable_async` 
             If set to true this enables async template execution which
             allows using async functions and generators.
-    """
-
-    #: if this environment is sandboxed.  Modifying this variable won't make
-    #: the environment sandboxed though.  For a real sandboxed environment
-    #: have a look at jinja2.sandbox.  This flag alone controls the code
-    #: generation by the compiler.
-    sandboxed = False
-
-    #: True if the environment is just an overlay
-    overlayed = False
-
-    #: the environment this environment is linked to if it is an overlay
+    """ 
+ 
+    #: if this environment is sandboxed.  Modifying this variable won't make 
+    #: the environment sandboxed though.  For a real sandboxed environment 
+    #: have a look at jinja2.sandbox.  This flag alone controls the code 
+    #: generation by the compiler. 
+    sandboxed = False 
+ 
+    #: True if the environment is just an overlay 
+    overlayed = False 
+ 
+    #: the environment this environment is linked to if it is an overlay 
     linked_to: t.Optional["Environment"] = None
-
-    #: shared environments have this set to `True`.  A shared environment
-    #: must not be modified
-    shared = False
-
-    #: the class that is used for code generation.  See
-    #: :class:`~jinja2.compiler.CodeGenerator` for more information.
+ 
+    #: shared environments have this set to `True`.  A shared environment 
+    #: must not be modified 
+    shared = False 
+ 
+    #: the class that is used for code generation.  See 
+    #: :class:`~jinja2.compiler.CodeGenerator` for more information. 
     code_generator_class: t.Type["CodeGenerator"] = CodeGenerator
-
+ 
     #: the context class that is used for templates.  See
-    #: :class:`~jinja2.runtime.Context` for more information.
+    #: :class:`~jinja2.runtime.Context` for more information. 
     context_class: t.Type[Context] = Context
-
+ 
     template_class: t.Type["Template"]
 
     def __init__(
@@ -313,73 +313,73 @@ class Environment:
         bytecode_cache: t.Optional["BytecodeCache"] = None,
         enable_async: bool = False,
     ):
-        # !!Important notice!!
-        #   The constructor accepts quite a few arguments that should be
-        #   passed by keyword rather than position.  However it's important to
-        #   not change the order of arguments because it's used at least
-        #   internally in those cases:
-        #       -   spontaneous environments (i18n extension and Template)
-        #       -   unittests
-        #   If parameter changes are required only add parameters at the end
-        #   and don't change the arguments (or the defaults!) of the arguments
-        #   existing already.
-
-        # lexer / parser information
-        self.block_start_string = block_start_string
-        self.block_end_string = block_end_string
-        self.variable_start_string = variable_start_string
-        self.variable_end_string = variable_end_string
-        self.comment_start_string = comment_start_string
-        self.comment_end_string = comment_end_string
-        self.line_statement_prefix = line_statement_prefix
-        self.line_comment_prefix = line_comment_prefix
-        self.trim_blocks = trim_blocks
-        self.lstrip_blocks = lstrip_blocks
-        self.newline_sequence = newline_sequence
-        self.keep_trailing_newline = keep_trailing_newline
-
-        # runtime information
+        # !!Important notice!! 
+        #   The constructor accepts quite a few arguments that should be 
+        #   passed by keyword rather than position.  However it's important to 
+        #   not change the order of arguments because it's used at least 
+        #   internally in those cases: 
+        #       -   spontaneous environments (i18n extension and Template) 
+        #       -   unittests 
+        #   If parameter changes are required only add parameters at the end 
+        #   and don't change the arguments (or the defaults!) of the arguments 
+        #   existing already. 
+ 
+        # lexer / parser information 
+        self.block_start_string = block_start_string 
+        self.block_end_string = block_end_string 
+        self.variable_start_string = variable_start_string 
+        self.variable_end_string = variable_end_string 
+        self.comment_start_string = comment_start_string 
+        self.comment_end_string = comment_end_string 
+        self.line_statement_prefix = line_statement_prefix 
+        self.line_comment_prefix = line_comment_prefix 
+        self.trim_blocks = trim_blocks 
+        self.lstrip_blocks = lstrip_blocks 
+        self.newline_sequence = newline_sequence 
+        self.keep_trailing_newline = keep_trailing_newline 
+ 
+        # runtime information 
         self.undefined: t.Type[Undefined] = undefined
-        self.optimized = optimized
-        self.finalize = finalize
-        self.autoescape = autoescape
-
-        # defaults
-        self.filters = DEFAULT_FILTERS.copy()
-        self.tests = DEFAULT_TESTS.copy()
-        self.globals = DEFAULT_NAMESPACE.copy()
-
-        # set the loader provided
-        self.loader = loader
-        self.cache = create_cache(cache_size)
-        self.bytecode_cache = bytecode_cache
-        self.auto_reload = auto_reload
-
-        # configurable policies
-        self.policies = DEFAULT_POLICIES.copy()
-
-        # load extensions
-        self.extensions = load_extensions(self, extensions)
-
+        self.optimized = optimized 
+        self.finalize = finalize 
+        self.autoescape = autoescape 
+ 
+        # defaults 
+        self.filters = DEFAULT_FILTERS.copy() 
+        self.tests = DEFAULT_TESTS.copy() 
+        self.globals = DEFAULT_NAMESPACE.copy() 
+ 
+        # set the loader provided 
+        self.loader = loader 
+        self.cache = create_cache(cache_size) 
+        self.bytecode_cache = bytecode_cache 
+        self.auto_reload = auto_reload 
+ 
+        # configurable policies 
+        self.policies = DEFAULT_POLICIES.copy() 
+ 
+        # load extensions 
+        self.extensions = load_extensions(self, extensions) 
+ 
         self.is_async = enable_async
         _environment_config_check(self)
-
+ 
     def add_extension(self, extension: t.Union[str, t.Type["Extension"]]) -> None:
-        """Adds an extension after the environment was created.
-
-        .. versionadded:: 2.5
-        """
-        self.extensions.update(load_extensions(self, [extension]))
-
+        """Adds an extension after the environment was created. 
+ 
+        .. versionadded:: 2.5 
+        """ 
+        self.extensions.update(load_extensions(self, [extension])) 
+ 
     def extend(self, **attributes: t.Any) -> None:
-        """Add the items to the instance of the environment if they do not exist
-        yet.  This is used by :ref:`extensions <writing-extensions>` to register
-        callbacks and configuration values without breaking inheritance.
-        """
+        """Add the items to the instance of the environment if they do not exist 
+        yet.  This is used by :ref:`extensions <writing-extensions>` to register 
+        callbacks and configuration values without breaking inheritance. 
+        """ 
         for key, value in attributes.items():
-            if not hasattr(self, key):
-                setattr(self, key, value)
-
+            if not hasattr(self, key): 
+                setattr(self, key, value) 
+ 
     def overlay(
         self,
         block_start_string: str = missing,
@@ -402,83 +402,83 @@ class Environment:
         auto_reload: bool = missing,
         bytecode_cache: t.Optional["BytecodeCache"] = missing,
     ) -> "Environment":
-        """Create a new overlay environment that shares all the data with the
-        current environment except for cache and the overridden attributes.
-        Extensions cannot be removed for an overlayed environment.  An overlayed
-        environment automatically gets all the extensions of the environment it
-        is linked to plus optional extra extensions.
-
-        Creating overlays should happen after the initial environment was set
-        up completely.  Not all attributes are truly linked, some are just
-        copied over so modifications on the original environment may not shine
-        through.
-        """
-        args = dict(locals())
+        """Create a new overlay environment that shares all the data with the 
+        current environment except for cache and the overridden attributes. 
+        Extensions cannot be removed for an overlayed environment.  An overlayed 
+        environment automatically gets all the extensions of the environment it 
+        is linked to plus optional extra extensions. 
+ 
+        Creating overlays should happen after the initial environment was set 
+        up completely.  Not all attributes are truly linked, some are just 
+        copied over so modifications on the original environment may not shine 
+        through. 
+        """ 
+        args = dict(locals()) 
         del args["self"], args["cache_size"], args["extensions"]
-
-        rv = object.__new__(self.__class__)
-        rv.__dict__.update(self.__dict__)
-        rv.overlayed = True
-        rv.linked_to = self
-
+ 
+        rv = object.__new__(self.__class__) 
+        rv.__dict__.update(self.__dict__) 
+        rv.overlayed = True 
+        rv.linked_to = self 
+ 
         for key, value in args.items():
-            if value is not missing:
-                setattr(rv, key, value)
-
-        if cache_size is not missing:
-            rv.cache = create_cache(cache_size)
-        else:
-            rv.cache = copy_cache(self.cache)
-
-        rv.extensions = {}
+            if value is not missing: 
+                setattr(rv, key, value) 
+ 
+        if cache_size is not missing: 
+            rv.cache = create_cache(cache_size) 
+        else: 
+            rv.cache = copy_cache(self.cache) 
+ 
+        rv.extensions = {} 
         for key, value in self.extensions.items():
-            rv.extensions[key] = value.bind(rv)
-        if extensions is not missing:
-            rv.extensions.update(load_extensions(rv, extensions))
-
+            rv.extensions[key] = value.bind(rv) 
+        if extensions is not missing: 
+            rv.extensions.update(load_extensions(rv, extensions)) 
+ 
         return _environment_config_check(rv)
-
+ 
     @property
     def lexer(self) -> Lexer:
         """The lexer for this environment."""
         return get_lexer(self)
-
+ 
     def iter_extensions(self) -> t.Iterator["Extension"]:
-        """Iterates over the extensions by priority."""
+        """Iterates over the extensions by priority.""" 
         return iter(sorted(self.extensions.values(), key=lambda x: x.priority))
-
+ 
     def getitem(
         self, obj: t.Any, argument: t.Union[str, t.Any]
     ) -> t.Union[t.Any, Undefined]:
-        """Get an item or attribute of an object but prefer the item."""
-        try:
-            return obj[argument]
-        except (AttributeError, TypeError, LookupError):
+        """Get an item or attribute of an object but prefer the item.""" 
+        try: 
+            return obj[argument] 
+        except (AttributeError, TypeError, LookupError): 
             if isinstance(argument, str):
-                try:
-                    attr = str(argument)
-                except Exception:
-                    pass
-                else:
-                    try:
-                        return getattr(obj, attr)
-                    except AttributeError:
-                        pass
-            return self.undefined(obj=obj, name=argument)
-
+                try: 
+                    attr = str(argument) 
+                except Exception: 
+                    pass 
+                else: 
+                    try: 
+                        return getattr(obj, attr) 
+                    except AttributeError: 
+                        pass 
+            return self.undefined(obj=obj, name=argument) 
+ 
     def getattr(self, obj: t.Any, attribute: str) -> t.Any:
-        """Get an item or attribute of an object but prefer the attribute.
+        """Get an item or attribute of an object but prefer the attribute. 
         Unlike :meth:`getitem` the attribute *must* be a string.
-        """
-        try:
-            return getattr(obj, attribute)
-        except AttributeError:
-            pass
-        try:
-            return obj[attribute]
-        except (TypeError, LookupError, AttributeError):
-            return self.undefined(obj=obj, name=attribute)
-
+        """ 
+        try: 
+            return getattr(obj, attribute) 
+        except AttributeError: 
+            pass 
+        try: 
+            return obj[attribute] 
+        except (TypeError, LookupError, AttributeError): 
+            return self.undefined(obj=obj, name=attribute) 
+ 
     def _filter_test_common(
         self,
         name: t.Union[str, Undefined],
@@ -495,10 +495,10 @@ class Environment:
         else:
             env_map = self.tests
             type_name = "test"
-
+ 
         func = env_map.get(name)  # type: ignore
-
-        if func is None:
+ 
+        if func is None: 
             msg = f"No {type_name} named {name!r}."
 
             if isinstance(name, Undefined):
@@ -514,25 +514,25 @@ class Environment:
         pass_arg = _PassArg.from_obj(func)
 
         if pass_arg is _PassArg.context:
-            if context is None:
+            if context is None: 
                 raise TemplateRuntimeError(
                     f"Attempted to invoke a context {type_name} without context."
                 )
 
-            args.insert(0, context)
+            args.insert(0, context) 
         elif pass_arg is _PassArg.eval_context:
-            if eval_ctx is None:
-                if context is not None:
-                    eval_ctx = context.eval_ctx
-                else:
-                    eval_ctx = EvalContext(self)
+            if eval_ctx is None: 
+                if context is not None: 
+                    eval_ctx = context.eval_ctx 
+                else: 
+                    eval_ctx = EvalContext(self) 
 
-            args.insert(0, eval_ctx)
+            args.insert(0, eval_ctx) 
         elif pass_arg is _PassArg.environment:
-            args.insert(0, self)
-
+            args.insert(0, self) 
+ 
         return func(*args, **kwargs)
-
+ 
     def call_filter(
         self,
         name: str,
@@ -548,12 +548,12 @@ class Environment:
         environment in async mode and the filter supports async
         execution. It's your responsibility to await this if needed.
 
-        .. versionadded:: 2.7
-        """
+        .. versionadded:: 2.7 
+        """ 
         return self._filter_test_common(
             name, value, args, kwargs, context, eval_ctx, True
         )
-
+ 
     def call_test(
         self,
         name: str,
@@ -579,69 +579,69 @@ class Environment:
             name, value, args, kwargs, context, eval_ctx, False
         )
 
-    @internalcode
+    @internalcode 
     def parse(
         self,
         source: str,
         name: t.Optional[str] = None,
         filename: t.Optional[str] = None,
     ) -> nodes.Template:
-        """Parse the sourcecode and return the abstract syntax tree.  This
-        tree of nodes is used by the compiler to convert the template into
-        executable source- or bytecode.  This is useful for debugging or to
-        extract information from templates.
-
+        """Parse the sourcecode and return the abstract syntax tree.  This 
+        tree of nodes is used by the compiler to convert the template into 
+        executable source- or bytecode.  This is useful for debugging or to 
+        extract information from templates. 
+ 
         If you are :ref:`developing Jinja extensions <writing-extensions>`
-        this gives you a good overview of the node tree generated.
-        """
-        try:
-            return self._parse(source, name, filename)
-        except TemplateSyntaxError:
+        this gives you a good overview of the node tree generated. 
+        """ 
+        try: 
+            return self._parse(source, name, filename) 
+        except TemplateSyntaxError: 
             self.handle_exception(source=source)
-
+ 
     def _parse(
         self, source: str, name: t.Optional[str], filename: t.Optional[str]
     ) -> nodes.Template:
-        """Internal parsing function used by `parse` and `compile`."""
+        """Internal parsing function used by `parse` and `compile`.""" 
         return Parser(self, source, name, filename).parse()
-
+ 
     def lex(
         self,
         source: str,
         name: t.Optional[str] = None,
         filename: t.Optional[str] = None,
     ) -> t.Iterator[t.Tuple[int, str, str]]:
-        """Lex the given sourcecode and return a generator that yields
-        tokens as tuples in the form ``(lineno, token_type, value)``.
-        This can be useful for :ref:`extension development <writing-extensions>`
-        and debugging templates.
-
-        This does not perform preprocessing.  If you want the preprocessing
-        of the extensions to be applied you have to filter source through
-        the :meth:`preprocess` method.
-        """
+        """Lex the given sourcecode and return a generator that yields 
+        tokens as tuples in the form ``(lineno, token_type, value)``. 
+        This can be useful for :ref:`extension development <writing-extensions>` 
+        and debugging templates. 
+ 
+        This does not perform preprocessing.  If you want the preprocessing 
+        of the extensions to be applied you have to filter source through 
+        the :meth:`preprocess` method. 
+        """ 
         source = str(source)
-        try:
-            return self.lexer.tokeniter(source, name, filename)
-        except TemplateSyntaxError:
+        try: 
+            return self.lexer.tokeniter(source, name, filename) 
+        except TemplateSyntaxError: 
             self.handle_exception(source=source)
-
+ 
     def preprocess(
         self,
         source: str,
         name: t.Optional[str] = None,
         filename: t.Optional[str] = None,
     ) -> str:
-        """Preprocesses the source with all extensions.  This is automatically
-        called for all parsing and compiling methods but *not* for :meth:`lex`
-        because there you usually only want the actual source tokenized.
-        """
+        """Preprocesses the source with all extensions.  This is automatically 
+        called for all parsing and compiling methods but *not* for :meth:`lex` 
+        because there you usually only want the actual source tokenized. 
+        """ 
         return reduce(
             lambda s, e: e.preprocess(s, name, filename),
             self.iter_extensions(),
             str(source),
         )
-
+ 
     def _tokenize(
         self,
         source: str,
@@ -649,20 +649,20 @@ class Environment:
         filename: t.Optional[str] = None,
         state: t.Optional[str] = None,
     ) -> TokenStream:
-        """Called by the parser to do the preprocessing and filtering
-        for all the extensions.  Returns a :class:`~jinja2.lexer.TokenStream`.
-        """
-        source = self.preprocess(source, name, filename)
-        stream = self.lexer.tokenize(source, name, filename, state)
+        """Called by the parser to do the preprocessing and filtering 
+        for all the extensions.  Returns a :class:`~jinja2.lexer.TokenStream`. 
+        """ 
+        source = self.preprocess(source, name, filename) 
+        stream = self.lexer.tokenize(source, name, filename, state) 
 
-        for ext in self.iter_extensions():
+        for ext in self.iter_extensions(): 
             stream = ext.filter_stream(stream)  # type: ignore
 
-            if not isinstance(stream, TokenStream):
+            if not isinstance(stream, TokenStream): 
                 stream = TokenStream(stream, name, filename)  # type: ignore
 
-        return stream
-
+        return stream 
+ 
     def _generate(
         self,
         source: nodes.Template,
@@ -670,11 +670,11 @@ class Environment:
         filename: t.Optional[str],
         defer_init: bool = False,
     ) -> str:
-        """Internal hook that can be overridden to hook a different generate
-        method in.
-
-        .. versionadded:: 2.5
-        """
+        """Internal hook that can be overridden to hook a different generate 
+        method in. 
+ 
+        .. versionadded:: 2.5 
+        """ 
         return generate(  # type: ignore
             source,
             self,
@@ -683,15 +683,15 @@ class Environment:
             defer_init=defer_init,
             optimized=self.optimized,
         )
-
+ 
     def _compile(self, source: str, filename: str) -> CodeType:
-        """Internal hook that can be overridden to hook a different compile
-        method in.
-
-        .. versionadded:: 2.5
-        """
+        """Internal hook that can be overridden to hook a different compile 
+        method in. 
+ 
+        .. versionadded:: 2.5 
+        """ 
         return compile(source, filename, "exec")  # type: ignore
-
+ 
     @typing.overload
     def compile(  # type: ignore
         self,
@@ -714,7 +714,7 @@ class Environment:
     ) -> str:
         ...
 
-    @internalcode
+    @internalcode 
     def compile(
         self,
         source: t.Union[str, nodes.Template],
@@ -723,84 +723,84 @@ class Environment:
         raw: bool = False,
         defer_init: bool = False,
     ) -> t.Union[str, CodeType]:
-        """Compile a node or template source code.  The `name` parameter is
-        the load name of the template after it was joined using
-        :meth:`join_path` if necessary, not the filename on the file system.
-        the `filename` parameter is the estimated filename of the template on
-        the file system.  If the template came from a database or memory this
-        can be omitted.
-
-        The return value of this method is a python code object.  If the `raw`
-        parameter is `True` the return value will be a string with python
-        code equivalent to the bytecode returned otherwise.  This method is
-        mainly used internally.
-
-        `defer_init` is use internally to aid the module code generator.  This
-        causes the generated code to be able to import without the global
-        environment variable to be set.
-
-        .. versionadded:: 2.4
-           `defer_init` parameter added.
-        """
-        source_hint = None
-        try:
+        """Compile a node or template source code.  The `name` parameter is 
+        the load name of the template after it was joined using 
+        :meth:`join_path` if necessary, not the filename on the file system. 
+        the `filename` parameter is the estimated filename of the template on 
+        the file system.  If the template came from a database or memory this 
+        can be omitted. 
+ 
+        The return value of this method is a python code object.  If the `raw` 
+        parameter is `True` the return value will be a string with python 
+        code equivalent to the bytecode returned otherwise.  This method is 
+        mainly used internally. 
+ 
+        `defer_init` is use internally to aid the module code generator.  This 
+        causes the generated code to be able to import without the global 
+        environment variable to be set. 
+ 
+        .. versionadded:: 2.4 
+           `defer_init` parameter added. 
+        """ 
+        source_hint = None 
+        try: 
             if isinstance(source, str):
-                source_hint = source
-                source = self._parse(source, name, filename)
+                source_hint = source 
+                source = self._parse(source, name, filename) 
             source = self._generate(source, name, filename, defer_init=defer_init)
-            if raw:
-                return source
-            if filename is None:
+            if raw: 
+                return source 
+            if filename is None: 
                 filename = "<template>"
-            return self._compile(source, filename)
-        except TemplateSyntaxError:
+            return self._compile(source, filename) 
+        except TemplateSyntaxError: 
             self.handle_exception(source=source_hint)
-
+ 
     def compile_expression(
         self, source: str, undefined_to_none: bool = True
     ) -> "TemplateExpression":
-        """A handy helper method that returns a callable that accepts keyword
-        arguments that appear as variables in the expression.  If called it
-        returns the result of the expression.
-
-        This is useful if applications want to use the same rules as Jinja
-        in template "configuration files" or similar situations.
-
-        Example usage:
-
-        >>> env = Environment()
-        >>> expr = env.compile_expression('foo == 42')
-        >>> expr(foo=23)
-        False
-        >>> expr(foo=42)
-        True
-
-        Per default the return value is converted to `None` if the
-        expression returns an undefined value.  This can be changed
-        by setting `undefined_to_none` to `False`.
-
-        >>> env.compile_expression('var')() is None
-        True
-        >>> env.compile_expression('var', undefined_to_none=False)()
-        Undefined
-
-        .. versionadded:: 2.1
-        """
+        """A handy helper method that returns a callable that accepts keyword 
+        arguments that appear as variables in the expression.  If called it 
+        returns the result of the expression. 
+ 
+        This is useful if applications want to use the same rules as Jinja 
+        in template "configuration files" or similar situations. 
+ 
+        Example usage: 
+ 
+        >>> env = Environment() 
+        >>> expr = env.compile_expression('foo == 42') 
+        >>> expr(foo=23) 
+        False 
+        >>> expr(foo=42) 
+        True 
+ 
+        Per default the return value is converted to `None` if the 
+        expression returns an undefined value.  This can be changed 
+        by setting `undefined_to_none` to `False`. 
+ 
+        >>> env.compile_expression('var')() is None 
+        True 
+        >>> env.compile_expression('var', undefined_to_none=False)() 
+        Undefined 
+ 
+        .. versionadded:: 2.1 
+        """ 
         parser = Parser(self, source, state="variable")
-        try:
-            expr = parser.parse_expression()
-            if not parser.stream.eos:
+        try: 
+            expr = parser.parse_expression() 
+            if not parser.stream.eos: 
                 raise TemplateSyntaxError(
                     "chunk after expression", parser.stream.current.lineno, None, None
                 )
-            expr.set_environment(self)
-        except TemplateSyntaxError:
+            expr.set_environment(self) 
+        except TemplateSyntaxError: 
             self.handle_exception(source=source)
 
         body = [nodes.Assign(nodes.Name("result", "store"), expr, lineno=1)]
-        template = self.from_string(nodes.Template(body, lineno=1))
-        return TemplateExpression(template, undefined_to_none)
-
+        template = self.from_string(nodes.Template(body, lineno=1)) 
+        return TemplateExpression(template, undefined_to_none) 
+ 
     def compile_templates(
         self,
         target: t.Union[str, os.PathLike],
@@ -810,27 +810,27 @@ class Environment:
         log_function: t.Optional[t.Callable[[str], None]] = None,
         ignore_errors: bool = True,
     ) -> None:
-        """Finds all the templates the loader can find, compiles them
-        and stores them in `target`.  If `zip` is `None`, instead of in a
-        zipfile, the templates will be stored in a directory.
-        By default a deflate zip algorithm is used. To switch to
-        the stored algorithm, `zip` can be set to ``'stored'``.
-
-        `extensions` and `filter_func` are passed to :meth:`list_templates`.
-        Each template returned will be compiled to the target folder or
-        zipfile.
-
-        By default template compilation errors are ignored.  In case a
-        log function is provided, errors are logged.  If you want template
-        syntax errors to abort the compilation you can set `ignore_errors`
-        to `False` and you will get an exception on syntax errors.
-
-        .. versionadded:: 2.4
-        """
+        """Finds all the templates the loader can find, compiles them 
+        and stores them in `target`.  If `zip` is `None`, instead of in a 
+        zipfile, the templates will be stored in a directory. 
+        By default a deflate zip algorithm is used. To switch to 
+        the stored algorithm, `zip` can be set to ``'stored'``. 
+ 
+        `extensions` and `filter_func` are passed to :meth:`list_templates`. 
+        Each template returned will be compiled to the target folder or 
+        zipfile. 
+ 
+        By default template compilation errors are ignored.  In case a 
+        log function is provided, errors are logged.  If you want template 
+        syntax errors to abort the compilation you can set `ignore_errors` 
+        to `False` and you will get an exception on syntax errors. 
+ 
+        .. versionadded:: 2.4 
+        """ 
         from .loaders import ModuleLoader
-
-        if log_function is None:
-
+ 
+        if log_function is None: 
+ 
             def log_function(x: str) -> None:
                 pass
 
@@ -838,72 +838,72 @@ class Environment:
         assert self.loader is not None, "No loader configured."
 
         def write_file(filename: str, data: str) -> None:
-            if zip:
-                info = ZipInfo(filename)
-                info.external_attr = 0o755 << 16
-                zip_file.writestr(info, data)
-            else:
+            if zip: 
+                info = ZipInfo(filename) 
+                info.external_attr = 0o755 << 16 
+                zip_file.writestr(info, data) 
+            else: 
                 with open(os.path.join(target, filename), "wb") as f:
                     f.write(data.encode("utf8"))
-
-        if zip is not None:
-            from zipfile import ZipFile, ZipInfo, ZIP_DEFLATED, ZIP_STORED
+ 
+        if zip is not None: 
+            from zipfile import ZipFile, ZipInfo, ZIP_DEFLATED, ZIP_STORED 
 
             zip_file = ZipFile(
                 target, "w", dict(deflated=ZIP_DEFLATED, stored=ZIP_STORED)[zip]
             )
             log_function(f"Compiling into Zip archive {target!r}")
-        else:
-            if not os.path.isdir(target):
-                os.makedirs(target)
+        else: 
+            if not os.path.isdir(target): 
+                os.makedirs(target) 
             log_function(f"Compiling into folder {target!r}")
-
-        try:
-            for name in self.list_templates(extensions, filter_func):
-                source, filename, _ = self.loader.get_source(self, name)
-                try:
-                    code = self.compile(source, name, filename, True, True)
-                except TemplateSyntaxError as e:
-                    if not ignore_errors:
-                        raise
+ 
+        try: 
+            for name in self.list_templates(extensions, filter_func): 
+                source, filename, _ = self.loader.get_source(self, name) 
+                try: 
+                    code = self.compile(source, name, filename, True, True) 
+                except TemplateSyntaxError as e: 
+                    if not ignore_errors: 
+                        raise 
                     log_function(f'Could not compile "{name}": {e}')
-                    continue
-
-                filename = ModuleLoader.get_module_filename(name)
-
+                    continue 
+ 
+                filename = ModuleLoader.get_module_filename(name) 
+ 
                 write_file(filename, code)
                 log_function(f'Compiled "{name}" as {filename}')
-        finally:
-            if zip:
-                zip_file.close()
-
+        finally: 
+            if zip: 
+                zip_file.close() 
+ 
         log_function("Finished compiling templates")
-
+ 
     def list_templates(
         self,
         extensions: t.Optional[t.Collection[str]] = None,
         filter_func: t.Optional[t.Callable[[str], bool]] = None,
     ) -> t.List[str]:
-        """Returns a list of templates for this environment.  This requires
-        that the loader supports the loader's
-        :meth:`~BaseLoader.list_templates` method.
-
-        If there are other files in the template folder besides the
-        actual templates, the returned list can be filtered.  There are two
-        ways: either `extensions` is set to a list of file extensions for
-        templates, or a `filter_func` can be provided which is a callable that
-        is passed a template name and should return `True` if it should end up
-        in the result list.
-
-        If the loader does not support that, a :exc:`TypeError` is raised.
-
-        .. versionadded:: 2.4
-        """
+        """Returns a list of templates for this environment.  This requires 
+        that the loader supports the loader's 
+        :meth:`~BaseLoader.list_templates` method. 
+ 
+        If there are other files in the template folder besides the 
+        actual templates, the returned list can be filtered.  There are two 
+        ways: either `extensions` is set to a list of file extensions for 
+        templates, or a `filter_func` can be provided which is a callable that 
+        is passed a template name and should return `True` if it should end up 
+        in the result list. 
+ 
+        If the loader does not support that, a :exc:`TypeError` is raised. 
+ 
+        .. versionadded:: 2.4 
+        """ 
         assert self.loader is not None, "No loader configured."
         names = self.loader.list_templates()
 
-        if extensions is not None:
-            if filter_func is not None:
+        if extensions is not None: 
+            if filter_func is not None: 
                 raise TypeError(
                     "either extensions or filter_func can be passed, but not both"
                 )
@@ -911,40 +911,40 @@ class Environment:
             def filter_func(x: str) -> bool:
                 return "." in x and x.rsplit(".", 1)[1] in extensions  # type: ignore
 
-        if filter_func is not None:
+        if filter_func is not None: 
             names = [name for name in names if filter_func(name)]
-
+ 
         return names
 
     def handle_exception(self, source: t.Optional[str] = None) -> "te.NoReturn":
-        """Exception handling helper.  This is used internally to either raise
-        rewritten exceptions or return a rendered traceback for the template.
-        """
+        """Exception handling helper.  This is used internally to either raise 
+        rewritten exceptions or return a rendered traceback for the template. 
+        """ 
         from .debug import rewrite_traceback_stack
-
+ 
         raise rewrite_traceback_stack(source=source)
-
+ 
     def join_path(self, template: str, parent: str) -> str:
-        """Join a template with the parent.  By default all the lookups are
-        relative to the loader root so this method returns the `template`
-        parameter unchanged, but if the paths should be relative to the
-        parent template, this function can be used to calculate the real
-        template name.
-
-        Subclasses may override this method and implement template path
-        joining here.
-        """
-        return template
-
-    @internalcode
+        """Join a template with the parent.  By default all the lookups are 
+        relative to the loader root so this method returns the `template` 
+        parameter unchanged, but if the paths should be relative to the 
+        parent template, this function can be used to calculate the real 
+        template name. 
+ 
+        Subclasses may override this method and implement template path 
+        joining here. 
+        """ 
+        return template 
+ 
+    @internalcode 
     def _load_template(
         self, name: str, globals: t.Optional[t.Mapping[str, t.Any]]
     ) -> "Template":
-        if self.loader is None:
+        if self.loader is None: 
             raise TypeError("no loader for this environment specified")
-        cache_key = (weakref.ref(self.loader), name)
-        if self.cache is not None:
-            template = self.cache.get(cache_key)
+        cache_key = (weakref.ref(self.loader), name) 
+        if self.cache is not None: 
+            template = self.cache.get(cache_key) 
             if template is not None and (
                 not self.auto_reload or template.is_up_to_date
             ):
@@ -953,15 +953,15 @@ class Environment:
                 if globals:
                     template.globals.update(globals)
 
-                return template
+                return template 
 
         template = self.loader.load(self, name, self.make_globals(globals))
 
-        if self.cache is not None:
-            self.cache[cache_key] = template
-        return template
-
-    @internalcode
+        if self.cache is not None: 
+            self.cache[cache_key] = template 
+        return template 
+ 
+    @internalcode 
     def get_template(
         self,
         name: t.Union[str, "Template"],
@@ -971,7 +971,7 @@ class Environment:
         """Load a template by name with :attr:`loader` and return a
         :class:`Template`. If the template does not exist a
         :exc:`TemplateNotFound` exception is raised.
-
+ 
         :param name: Name of the template to load.
         :param parent: The name of the parent template importing this
             template. :meth:`join_path` can be used to implement name
@@ -980,23 +980,23 @@ class Environment:
             these extra variables available for all renders of this
             template. If the template has already been loaded and
             cached, its globals are updated with any new items.
-
+ 
         .. versionchanged:: 3.0
             If a template is loaded from cache, ``globals`` will update
             the template's globals instead of ignoring the new values.
-
-        .. versionchanged:: 2.4
+ 
+        .. versionchanged:: 2.4 
             If ``name`` is a :class:`Template` object it is returned
             unchanged.
-        """
-        if isinstance(name, Template):
-            return name
-        if parent is not None:
-            name = self.join_path(name, parent)
-
+        """ 
+        if isinstance(name, Template): 
+            return name 
+        if parent is not None: 
+            name = self.join_path(name, parent) 
+ 
         return self._load_template(name, globals)
 
-    @internalcode
+    @internalcode 
     def select_template(
         self,
         names: t.Iterable[t.Union[str, "Template"]],
@@ -1006,7 +1006,7 @@ class Environment:
         """Like :meth:`get_template`, but tries loading multiple names.
         If none of the names can be loaded a :exc:`TemplatesNotFound`
         exception is raised.
-
+ 
         :param names: List of template names to try loading in order.
         :param parent: The name of the parent template importing this
             template. :meth:`join_path` can be used to implement name
@@ -1024,33 +1024,33 @@ class Environment:
             If ``names`` is :class:`Undefined`, an :exc:`UndefinedError`
             is raised instead. If no templates were found and ``names``
             contains :class:`Undefined`, the message is more helpful.
-
-        .. versionchanged:: 2.4
+ 
+        .. versionchanged:: 2.4 
             If ``names`` contains a :class:`Template` object it is
             returned unchanged.
 
         .. versionadded:: 2.3
-        """
+        """ 
         if isinstance(names, Undefined):
             names._fail_with_undefined_error()
 
-        if not names:
+        if not names: 
             raise TemplatesNotFound(
                 message="Tried to select from an empty list of templates."
             )
 
-        for name in names:
-            if isinstance(name, Template):
-                return name
-            if parent is not None:
-                name = self.join_path(name, parent)
-            try:
-                return self._load_template(name, globals)
+        for name in names: 
+            if isinstance(name, Template): 
+                return name 
+            if parent is not None: 
+                name = self.join_path(name, parent) 
+            try: 
+                return self._load_template(name, globals) 
             except (TemplateNotFound, UndefinedError):
-                pass
+                pass 
         raise TemplatesNotFound(names)  # type: ignore
-
-    @internalcode
+ 
+    @internalcode 
     def get_or_select_template(
         self,
         template_name_or_list: t.Union[
@@ -1061,15 +1061,15 @@ class Environment:
     ) -> "Template":
         """Use :meth:`select_template` if an iterable of template names
         is given, or :meth:`get_template` if one name is given.
-
-        .. versionadded:: 2.3
-        """
+ 
+        .. versionadded:: 2.3 
+        """ 
         if isinstance(template_name_or_list, (str, Undefined)):
-            return self.get_template(template_name_or_list, parent, globals)
-        elif isinstance(template_name_or_list, Template):
-            return template_name_or_list
-        return self.select_template(template_name_or_list, parent, globals)
-
+            return self.get_template(template_name_or_list, parent, globals) 
+        elif isinstance(template_name_or_list, Template): 
+            return template_name_or_list 
+        return self.select_template(template_name_or_list, parent, globals) 
+ 
     def from_string(
         self,
         source: t.Union[str, nodes.Template],
@@ -1086,22 +1086,22 @@ class Environment:
             cached, its globals are updated with any new items.
         :param template_class: Return an instance of this
             :class:`Template` class.
-        """
+        """ 
         gs = self.make_globals(globals)
-        cls = template_class or self.template_class
+        cls = template_class or self.template_class 
         return cls.from_code(self, self.compile(source), gs, None)
-
+ 
     def make_globals(
         self, d: t.Optional[t.Mapping[str, t.Any]]
     ) -> t.MutableMapping[str, t.Any]:
         """Make the globals map for a template. Any given template
         globals overlay the environment :attr:`globals`.
-
+ 
         Returns a :class:`collections.ChainMap`. This allows any changes
         to a template's globals to only affect that template, while
         changes to the environment's globals are still reflected.
         However, avoid modifying any globals after a template is loaded.
-
+ 
         :param d: Dict of template-specific globals.
 
         .. versionchanged:: 3.0
@@ -1116,21 +1116,21 @@ class Environment:
 
 class Template:
     """A compiled template that can be rendered.
-
+ 
     Use the methods on :class:`Environment` to create or load templates.
     The environment is used to configure how templates are compiled and
     behave.
-
+ 
     It is also possible to create a template object directly. This is
     not usually recommended. The constructor takes most of the same
     arguments as :class:`Environment`. All templates created with the
     same environment arguments share the same ephemeral ``Environment``
     instance behind the scenes.
-
+ 
     A template object should be considered immutable. Modifications on
     the object are not supported.
-    """
-
+    """ 
+ 
     #: Type of environment to create when creating a template directly
     #: rather than through an existing environment.
     environment_class: t.Type[Environment] = Environment
@@ -1167,7 +1167,7 @@ class Template:
         autoescape: t.Union[bool, t.Callable[[t.Optional[str]], bool]] = False,
         enable_async: bool = False,
     ) -> t.Any:  # it returns a `Template`, but this breaks the sphinx build...
-        env = get_spontaneous_environment(
+        env = get_spontaneous_environment( 
             cls.environment_class,  # type: ignore
             block_start_string,
             block_end_string,
@@ -1192,9 +1192,9 @@ class Template:
             None,
             enable_async,
         )
-        return env.from_string(source, template_class=cls)
-
-    @classmethod
+        return env.from_string(source, template_class=cls) 
+ 
+    @classmethod 
     def from_code(
         cls,
         environment: Environment,
@@ -1202,30 +1202,30 @@ class Template:
         globals: t.MutableMapping[str, t.Any],
         uptodate: t.Optional[t.Callable[[], bool]] = None,
     ) -> "Template":
-        """Creates a template object from compiled code and the globals.  This
-        is used by the loaders and environment to create a template object.
-        """
+        """Creates a template object from compiled code and the globals.  This 
+        is used by the loaders and environment to create a template object. 
+        """ 
         namespace = {"environment": environment, "__file__": code.co_filename}
-        exec(code, namespace)
-        rv = cls._from_namespace(environment, namespace, globals)
-        rv._uptodate = uptodate
-        return rv
-
-    @classmethod
+        exec(code, namespace) 
+        rv = cls._from_namespace(environment, namespace, globals) 
+        rv._uptodate = uptodate 
+        return rv 
+ 
+    @classmethod 
     def from_module_dict(
         cls,
         environment: Environment,
         module_dict: t.MutableMapping[str, t.Any],
         globals: t.MutableMapping[str, t.Any],
     ) -> "Template":
-        """Creates a template object from a module.  This is used by the
-        module loader to create a template object.
-
-        .. versionadded:: 2.4
-        """
-        return cls._from_namespace(environment, module_dict, globals)
-
-    @classmethod
+        """Creates a template object from a module.  This is used by the 
+        module loader to create a template object. 
+ 
+        .. versionadded:: 2.4 
+        """ 
+        return cls._from_namespace(environment, module_dict, globals) 
+ 
+    @classmethod 
     def _from_namespace(
         cls,
         environment: Environment,
@@ -1233,36 +1233,36 @@ class Template:
         globals: t.MutableMapping[str, t.Any],
     ) -> "Template":
         t: "Template" = object.__new__(cls)
-        t.environment = environment
-        t.globals = globals
+        t.environment = environment 
+        t.globals = globals 
         t.name = namespace["name"]
         t.filename = namespace["__file__"]
         t.blocks = namespace["blocks"]
-
-        # render function and module
+ 
+        # render function and module 
         t.root_render_func = namespace["root"]  # type: ignore
-        t._module = None
-
-        # debug and loader helpers
+        t._module = None 
+ 
+        # debug and loader helpers 
         t._debug_info = namespace["debug_info"]
-        t._uptodate = None
-
-        # store the reference
+        t._uptodate = None 
+ 
+        # store the reference 
         namespace["environment"] = environment
         namespace["__jinja_template__"] = t
-
-        return t
-
+ 
+        return t 
+ 
     def render(self, *args: t.Any, **kwargs: t.Any) -> str:
-        """This method accepts the same arguments as the `dict` constructor:
-        A dict, a dict subclass or some keyword arguments.  If no arguments
-        are given the context will be empty.  These two calls do the same::
-
-            template.render(knights='that say nih')
-            template.render({'knights': 'that say nih'})
-
+        """This method accepts the same arguments as the `dict` constructor: 
+        A dict, a dict subclass or some keyword arguments.  If no arguments 
+        are given the context will be empty.  These two calls do the same:: 
+ 
+            template.render(knights='that say nih') 
+            template.render({'knights': 'that say nih'}) 
+ 
         This will return the rendered template as a string.
-        """
+        """ 
         if self.environment.is_async:
             import asyncio
 
@@ -1285,25 +1285,25 @@ class Template:
 
         ctx = self.new_context(dict(*args, **kwargs))
 
-        try:
+        try: 
             return concat(self.root_render_func(ctx))  # type: ignore
-        except Exception:
+        except Exception: 
             self.environment.handle_exception()
-
+ 
     async def render_async(self, *args: t.Any, **kwargs: t.Any) -> str:
-        """This works similar to :meth:`render` but returns a coroutine
-        that when awaited returns the entire rendered template string.  This
-        requires the async feature to be enabled.
-
-        Example usage::
-
-            await template.render_async(knights='that say nih; asynchronously')
-        """
+        """This works similar to :meth:`render` but returns a coroutine 
+        that when awaited returns the entire rendered template string.  This 
+        requires the async feature to be enabled. 
+ 
+        Example usage:: 
+ 
+            await template.render_async(knights='that say nih; asynchronously') 
+        """ 
         if not self.environment.is_async:
             raise RuntimeError(
                 "The environment was not created with async mode enabled."
             )
-
+ 
         ctx = self.new_context(dict(*args, **kwargs))
 
         try:
@@ -1312,19 +1312,19 @@ class Template:
             return self.environment.handle_exception()
 
     def stream(self, *args: t.Any, **kwargs: t.Any) -> "TemplateStream":
-        """Works exactly like :meth:`generate` but returns a
-        :class:`TemplateStream`.
-        """
-        return TemplateStream(self.generate(*args, **kwargs))
-
+        """Works exactly like :meth:`generate` but returns a 
+        :class:`TemplateStream`. 
+        """ 
+        return TemplateStream(self.generate(*args, **kwargs)) 
+ 
     def generate(self, *args: t.Any, **kwargs: t.Any) -> t.Iterator[str]:
-        """For very large templates it can be useful to not render the whole
-        template at once but evaluate each statement after another and yield
-        piece for piece.  This method basically does exactly that and returns
+        """For very large templates it can be useful to not render the whole 
+        template at once but evaluate each statement after another and yield 
+        piece for piece.  This method basically does exactly that and returns 
         a generator that yields one item after another as strings.
-
-        It accepts the same arguments as :meth:`render`.
-        """
+ 
+        It accepts the same arguments as :meth:`render`. 
+        """ 
         if self.environment.is_async:
             import asyncio
 
@@ -1342,22 +1342,22 @@ class Template:
 
         ctx = self.new_context(dict(*args, **kwargs))
 
-        try:
+        try: 
             yield from self.root_render_func(ctx)  # type: ignore
-        except Exception:
+        except Exception: 
             yield self.environment.handle_exception()
-
+ 
     async def generate_async(
         self, *args: t.Any, **kwargs: t.Any
     ) -> t.AsyncIterator[str]:
-        """An async version of :meth:`generate`.  Works very similarly but
-        returns an async iterator instead.
-        """
+        """An async version of :meth:`generate`.  Works very similarly but 
+        returns an async iterator instead. 
+        """ 
         if not self.environment.is_async:
             raise RuntimeError(
                 "The environment was not created with async mode enabled."
             )
-
+ 
         ctx = self.new_context(dict(*args, **kwargs))
 
         try:
@@ -1372,55 +1372,55 @@ class Template:
         shared: bool = False,
         locals: t.Optional[t.Mapping[str, t.Any]] = None,
     ) -> Context:
-        """Create a new :class:`Context` for this template.  The vars
-        provided will be passed to the template.  Per default the globals
-        are added to the context.  If shared is set to `True` the data
+        """Create a new :class:`Context` for this template.  The vars 
+        provided will be passed to the template.  Per default the globals 
+        are added to the context.  If shared is set to `True` the data 
         is passed as is to the context without adding the globals.
-
-        `locals` can be a dict of local variables for internal usage.
-        """
+ 
+        `locals` can be a dict of local variables for internal usage. 
+        """ 
         return new_context(
             self.environment, self.name, self.blocks, vars, shared, self.globals, locals
         )
-
+ 
     def make_module(
         self,
         vars: t.Optional[t.Dict[str, t.Any]] = None,
         shared: bool = False,
         locals: t.Optional[t.Mapping[str, t.Any]] = None,
     ) -> "TemplateModule":
-        """This method works like the :attr:`module` attribute when called
-        without arguments but it will evaluate the template on every call
-        rather than caching it.  It's also possible to provide
-        a dict which is then used as context.  The arguments are the same
-        as for the :meth:`new_context` method.
-        """
+        """This method works like the :attr:`module` attribute when called 
+        without arguments but it will evaluate the template on every call 
+        rather than caching it.  It's also possible to provide 
+        a dict which is then used as context.  The arguments are the same 
+        as for the :meth:`new_context` method. 
+        """ 
         ctx = self.new_context(vars, shared, locals)
         return TemplateModule(self, ctx)
-
+ 
     async def make_module_async(
         self,
         vars: t.Optional[t.Dict[str, t.Any]] = None,
         shared: bool = False,
         locals: t.Optional[t.Mapping[str, t.Any]] = None,
     ) -> "TemplateModule":
-        """As template module creation can invoke template code for
+        """As template module creation can invoke template code for 
         asynchronous executions this method must be used instead of the
-        normal :meth:`make_module` one.  Likewise the module attribute
-        becomes unavailable in async mode.
-        """
+        normal :meth:`make_module` one.  Likewise the module attribute 
+        becomes unavailable in async mode. 
+        """ 
         ctx = self.new_context(vars, shared, locals)
         return TemplateModule(
             self, ctx, [x async for x in self.root_render_func(ctx)]  # type: ignore
         )
-
-    @internalcode
+ 
+    @internalcode 
     def _get_default_module(self, ctx: t.Optional[Context] = None) -> "TemplateModule":
         """If a context is passed in, this means that the template was
         imported. Imported templates have access to the current
         template's globals by default, but they can only be accessed via
         the context during runtime.
-
+ 
         If there are new globals, we need to create a new module because
         the cached module is already rendered and will not have access
         to globals from the current context. This new module is not
@@ -1455,41 +1455,41 @@ class Template:
 
         return self._module
 
-    @property
+    @property 
     def module(self) -> "TemplateModule":
-        """The template as module.  This is used for imports in the
-        template runtime but is also useful if one wants to access
-        exported template variables from the Python layer:
-
-        >>> t = Template('{% macro foo() %}42{% endmacro %}23')
-        >>> str(t.module)
-        '23'
-        >>> t.module.foo() == u'42'
-        True
-
-        This attribute is not available if async mode is enabled.
-        """
-        return self._get_default_module()
-
+        """The template as module.  This is used for imports in the 
+        template runtime but is also useful if one wants to access 
+        exported template variables from the Python layer: 
+ 
+        >>> t = Template('{% macro foo() %}42{% endmacro %}23') 
+        >>> str(t.module) 
+        '23' 
+        >>> t.module.foo() == u'42' 
+        True 
+ 
+        This attribute is not available if async mode is enabled. 
+        """ 
+        return self._get_default_module() 
+ 
     def get_corresponding_lineno(self, lineno: int) -> int:
-        """Return the source line number of a line number in the
-        generated bytecode as they are not in sync.
-        """
-        for template_line, code_line in reversed(self.debug_info):
-            if code_line <= lineno:
-                return template_line
-        return 1
-
-    @property
+        """Return the source line number of a line number in the 
+        generated bytecode as they are not in sync. 
+        """ 
+        for template_line, code_line in reversed(self.debug_info): 
+            if code_line <= lineno: 
+                return template_line 
+        return 1 
+ 
+    @property 
     def is_up_to_date(self) -> bool:
-        """If this variable is `False` there is a newer version available."""
-        if self._uptodate is None:
-            return True
-        return self._uptodate()
-
-    @property
+        """If this variable is `False` there is a newer version available.""" 
+        if self._uptodate is None: 
+            return True 
+        return self._uptodate() 
+ 
+    @property 
     def debug_info(self) -> t.List[t.Tuple[int, int]]:
-        """The debug info mapping."""
+        """The debug info mapping.""" 
         if self._debug_info:
             return [
                 tuple(map(int, x.split("=")))  # type: ignore
@@ -1497,29 +1497,29 @@ class Template:
             ]
 
         return []
-
+ 
     def __repr__(self) -> str:
-        if self.name is None:
+        if self.name is None: 
             name = f"memory:{id(self):x}"
-        else:
-            name = repr(self.name)
+        else: 
+            name = repr(self.name) 
         return f"<{type(self).__name__} {name}>"
-
-
+ 
+ 
 class TemplateModule:
-    """Represents an imported template.  All the exported names of the
-    template are available as attributes on this object.  Additionally
+    """Represents an imported template.  All the exported names of the 
+    template are available as attributes on this object.  Additionally 
     converting it into a string renders the contents.
-    """
-
+    """ 
+ 
     def __init__(
         self,
         template: Template,
         context: Context,
         body_stream: t.Optional[t.Iterable[str]] = None,
     ) -> None:
-        if body_stream is None:
-            if context.environment.is_async:
+        if body_stream is None: 
+            if context.environment.is_async: 
                 raise RuntimeError(
                     "Async mode requires a body stream to be passed to"
                     " a template module. Use the async methods of the"
@@ -1528,134 +1528,134 @@ class TemplateModule:
 
             body_stream = list(template.root_render_func(context))  # type: ignore
 
-        self._body_stream = body_stream
-        self.__dict__.update(context.get_exported())
-        self.__name__ = template.name
-
+        self._body_stream = body_stream 
+        self.__dict__.update(context.get_exported()) 
+        self.__name__ = template.name 
+ 
     def __html__(self) -> Markup:
-        return Markup(concat(self._body_stream))
-
+        return Markup(concat(self._body_stream)) 
+ 
     def __str__(self) -> str:
-        return concat(self._body_stream)
-
+        return concat(self._body_stream) 
+ 
     def __repr__(self) -> str:
-        if self.__name__ is None:
+        if self.__name__ is None: 
             name = f"memory:{id(self):x}"
-        else:
-            name = repr(self.__name__)
+        else: 
+            name = repr(self.__name__) 
         return f"<{type(self).__name__} {name}>"
-
-
+ 
+ 
 class TemplateExpression:
-    """The :meth:`jinja2.Environment.compile_expression` method returns an
-    instance of this object.  It encapsulates the expression-like access
-    to the template with an expression it wraps.
-    """
-
+    """The :meth:`jinja2.Environment.compile_expression` method returns an 
+    instance of this object.  It encapsulates the expression-like access 
+    to the template with an expression it wraps. 
+    """ 
+ 
     def __init__(self, template: Template, undefined_to_none: bool) -> None:
-        self._template = template
-        self._undefined_to_none = undefined_to_none
-
+        self._template = template 
+        self._undefined_to_none = undefined_to_none 
+ 
     def __call__(self, *args: t.Any, **kwargs: t.Any) -> t.Optional[t.Any]:
-        context = self._template.new_context(dict(*args, **kwargs))
+        context = self._template.new_context(dict(*args, **kwargs)) 
         consume(self._template.root_render_func(context))  # type: ignore
         rv = context.vars["result"]
-        if self._undefined_to_none and isinstance(rv, Undefined):
-            rv = None
-        return rv
-
-
+        if self._undefined_to_none and isinstance(rv, Undefined): 
+            rv = None 
+        return rv 
+ 
+ 
 class TemplateStream:
-    """A template stream works pretty much like an ordinary python generator
-    but it can buffer multiple items to reduce the number of total iterations.
-    Per default the output is unbuffered which means that for every unbuffered
+    """A template stream works pretty much like an ordinary python generator 
+    but it can buffer multiple items to reduce the number of total iterations. 
+    Per default the output is unbuffered which means that for every unbuffered 
     instruction in the template one string is yielded.
-
-    If buffering is enabled with a buffer size of 5, five items are combined
+ 
+    If buffering is enabled with a buffer size of 5, five items are combined 
     into a new string.  This is mainly useful if you are streaming
-    big templates to a client via WSGI which flushes after each iteration.
-    """
-
+    big templates to a client via WSGI which flushes after each iteration. 
+    """ 
+ 
     def __init__(self, gen: t.Iterator[str]) -> None:
-        self._gen = gen
-        self.disable_buffering()
-
+        self._gen = gen 
+        self.disable_buffering() 
+ 
     def dump(
         self,
         fp: t.Union[str, t.IO],
         encoding: t.Optional[str] = None,
         errors: t.Optional[str] = "strict",
     ) -> None:
-        """Dump the complete stream into a file or file-like object.
+        """Dump the complete stream into a file or file-like object. 
         Per default strings are written, if you want to encode
-        before writing specify an `encoding`.
-
-        Example usage::
-
-            Template('Hello {{ name }}!').stream(name='foo').dump('hello.html')
-        """
-        close = False
+        before writing specify an `encoding`. 
+ 
+        Example usage:: 
+ 
+            Template('Hello {{ name }}!').stream(name='foo').dump('hello.html') 
+        """ 
+        close = False 
 
         if isinstance(fp, str):
-            if encoding is None:
+            if encoding is None: 
                 encoding = "utf-8"
 
             fp = open(fp, "wb")
-            close = True
-        try:
-            if encoding is not None:
+            close = True 
+        try: 
+            if encoding is not None: 
                 iterable = (x.encode(encoding, errors) for x in self)  # type: ignore
-            else:
+            else: 
                 iterable = self  # type: ignore
 
             if hasattr(fp, "writelines"):
-                fp.writelines(iterable)
-            else:
-                for item in iterable:
-                    fp.write(item)
-        finally:
-            if close:
-                fp.close()
-
+                fp.writelines(iterable) 
+            else: 
+                for item in iterable: 
+                    fp.write(item) 
+        finally: 
+            if close: 
+                fp.close() 
+ 
     def disable_buffering(self) -> None:
-        """Disable the output buffering."""
-        self._next = partial(next, self._gen)
-        self.buffered = False
-
+        """Disable the output buffering.""" 
+        self._next = partial(next, self._gen) 
+        self.buffered = False 
+ 
     def _buffered_generator(self, size: int) -> t.Iterator[str]:
         buf: t.List[str] = []
-        c_size = 0
-        push = buf.append
-
+        c_size = 0 
+        push = buf.append 
+ 
         while True:
-            try:
-                while c_size < size:
-                    c = next(self._gen)
-                    push(c)
-                    if c:
-                        c_size += 1
-            except StopIteration:
-                if not c_size:
-                    return
-            yield concat(buf)
-            del buf[:]
-            c_size = 0
-
+            try: 
+                while c_size < size: 
+                    c = next(self._gen) 
+                    push(c) 
+                    if c: 
+                        c_size += 1 
+            except StopIteration: 
+                if not c_size: 
+                    return 
+            yield concat(buf) 
+            del buf[:] 
+            c_size = 0 
+ 
     def enable_buffering(self, size: int = 5) -> None:
-        """Enable buffering.  Buffer `size` items before yielding them."""
-        if size <= 1:
+        """Enable buffering.  Buffer `size` items before yielding them.""" 
+        if size <= 1: 
             raise ValueError("buffer size too small")
-
-        self.buffered = True
-        self._next = partial(next, self._buffered_generator(size))
-
+ 
+        self.buffered = True 
+        self._next = partial(next, self._buffered_generator(size)) 
+ 
     def __iter__(self) -> "TemplateStream":
-        return self
-
+        return self 
+ 
     def __next__(self) -> str:
         return self._next()  # type: ignore
-
-
-# hook in default template class.  if anyone reads this comment: ignore that
-# it's possible to use custom templates ;-)
-Environment.template_class = Template
+ 
+ 
+# hook in default template class.  if anyone reads this comment: ignore that 
+# it's possible to use custom templates ;-) 
+Environment.template_class = Template