Fixed #17229 -- Allow 'True', 'False' and 'None' to resolve to the corresponding Python objects in templates.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17894 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/template/context.py

@@ -18,7 +18,10 @@ class BaseContext(object):
         self._reset_dicts(dict_)
 
     def _reset_dicts(self, value=None):
-        self.dicts = [value or {}]
+        builtins = {'True': True, 'False': False, 'None': None}
+        if value:
+            builtins.update(value)
+        self.dicts = [builtins]
 
     def __copy__(self):
         duplicate = copy(super(BaseContext, self))