Fixed #7301 -- Corrected minor typo in docstring. Thanks, micahcowan.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@7557 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/template/defaulttags.py

@@ -515,7 +515,7 @@ def debug(parser, token):
 #@register.tag(name="filter")
 def do_filter(parser, token):
     """
-    Filters the contents of the blog through variable filters.
+    Filters the contents of the block through variable filters.
 
     Filters can also be piped through each other, and they can have
     arguments -- just like in variable syntax.