Made a minor tweak to a doctoring in `django/forms.forms.py` that was missed in r17452. Thanks to Claude Paroz for the tip.
Made a minor tweak to a doctoring in `django/forms.forms.py` that was missed in r17452. Thanks to Claude Paroz for the tip.

git-svn-id: 554f83ef17aa7291f84efa897c1acfc5d0035373@17453 bcc190cf-cafb-0310-a4f2-bffc1f526a37

svn2github/django,svn2github/django,svn2github/django