[1.2.X] Fixed #14577 -- fixed a docstring typo. Thanks to dauerbaustelle for...

[1.2.X] Fixed #14577 -- fixed a docstring typo.  Thanks to dauerbaustelle for the report and patch.  Backport of [14364].

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14365 bcc190cf-cafb-0310-a4f2-bffc1f526a37