[1.1.X] Fixed #13382 -- Modified a message used for testing purposes to allow...

[1.1.X] Fixed #13382 -- Modified a message used for testing purposes to allow test passes under PyPy. Thanks to Alex Gaynor for the report and patch.

Backport of r13003 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@13004 bcc190cf-cafb-0310-a4f2-bffc1f526a37