Fixed #7292 -- Removed reference to form_for_model in the form_previe…

…w docs. Thanks to programmerq for the report.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@7675 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/form_preview.txt

@@ -69,12 +69,10 @@ How to use ``FormPreview``
 
        ...and add the following line to the appropriate model in your URLconf::
 
-           (r'^post/$', SomeModelFormPreview(forms.models.form_for_model(SomeModel))),
-
-       Or, if you already have a Form class defined for the model::
-
            (r'^post/$', SomeModelFormPreview(SomeModelForm)),
 
+       where ``SomeModelForm`` is a Form or ModelForm class for the model.
+
     4. Run the Django server and visit ``/post/`` in your browser.
 
 .. _template loader docs: ../templates_python/#loader-types