Edited docs/topics/forms/index.txt changes from [9569] and fixed a typo in the...

Edited docs/topics/forms/index.txt changes from [9569] and fixed a typo in the visible_fields() docstring

git-svn-id: http://code.djangoproject.com/svn/django/trunk@9592 bcc190cf-cafb-0310-a4f2-bffc1f526a37