[1.0.X]: Fixed #10120 -- Added a `return` to a doc example, patch from andrews.

Backport of r10265 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@10266 bcc190cf-cafb-0310-a4f2-bffc1f526a37