[1.1.X] Fixed #13002 -- Corrected description of the default form base class...

[1.1.X] Fixed #13002 -- Corrected description of the default form base class in InlineModelAdmin classes. Thanks to stijn@typograaf.be for the report, and timo for the patch.

Backport of r13209 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@13214 bcc190cf-cafb-0310-a4f2-bffc1f526a37