Corrected ModelFormMixin.form_invalid() signature in docs.
@@ -173,7 +173,7 @@ The following mixins are used to construct Django's editing views:
redirects to
:meth:`~django.views.generic.edit.FormMixin.get_success_url`.
- .. method:: form_invalid()
+ .. method:: form_invalid(form)
Renders a response, providing the invalid form as context.
