binding: Updates Jinja2 from 2.7.1 to 2.8.

third_party/jinja2/meta.py

 # -*- coding: utf-8 -*-
 """
     jinja2.meta
     ~~~~~~~~~~~
 
     This module implements various functions that exposes information about
     templates that might be interesting for various kinds of applications.
 
     :copyright: (c) 2010 by the Jinja Team, see AUTHORS for more details.
     :license: BSD, see LICENSE for more details.
@@ skipping 21 matching lines @@
 
 def find_undeclared_variables(ast):
     """Returns a set of all variables in the AST that will be looked up from
     the context at runtime.  Because at compile time it's not known which
     variables will be used depending on the path the execution takes at
     runtime, all variables are returned.
 
     >>> from jinja2 import Environment, meta
     >>> env = Environment()
     >>> ast = env.parse('{% set foo = 42 %}{{ bar + foo }}')
-    >>> meta.find_undeclared_variables(ast)
-    set(['bar'])
+    >>> meta.find_undeclared_variables(ast) == set(['bar'])
+    True
 
     .. admonition:: Implementation
 
        Internally the code generator is used for finding undeclared variables.
        This is good to know because the code generator might raise a
        :exc:`TemplateAssertionError` during compilation and as a matter of
        fact this function can currently raise that exception as well.
     """
     codegen = TrackingCodeGenerator(ast.environment)
     codegen.visit(ast)
@@ skipping 40 matching lines @@
         # yield the consts that are strings.  We could warn here for
         # non string values
         elif isinstance(node, nodes.Include) and \
              isinstance(node.template.value, (tuple, list)):
             for template_name in node.template.value:
                 if isinstance(template_name, string_types):
                     yield template_name
         # something else we don't care about, we could warn here
         else:
             yield None