tswicegood/django — comment on commit 1e369ec1fb5442607647666be31069796e213ba1
File: django/views/generic/edit.py line 30
By tswicegood:

Excellent point on the BC. If someone had written a subclass of `FormMixin` that relied on `get_form` always providing a class this would change that behavior. I'll bring it up on [the ticket][] as well.

[the ticket]: https://code.djangoproject.com/ticket/17557