bug#40573: 27.0.90; flymake-mode broken in scratch buffer

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: Eli Zaretskii <eliz@gnu.org>,  joaotavora@gmail.com,
>   40573@debbugs.gnu.org,  dgutov@yandex.ru
> Date: Thu, 16 Apr 2020 19:06:51 -0400
> 
> > Each package could add its data file name to auto-mode-alist.
> > For example, bookmark.el could do something like:
> >
> >   (add-to-list 'auto-mode-alist (cons bookmark-default-file 
> > 'emacs-lisp-data-mode))
> 
> For generated files, it's probably better to add a -*- cookie in
> the file.

Right.  But some modes define an init file that users need to create
and maintain.