bug#37945: [Auctex] Revert font locking to defaults

[Tassilo Horn]

Dominik Schrempf <dominik.schrempf@gmail.com> writes:

> I wanted to inquire on the status of the mentioned report since the
> issue has not been resolved. Custom font lock is still broken with
> LaTeX files in Emacs.

If you can, you can test-drive the AUCTeX branch
obsolete-font-latex-update-font-lock where I hopefully fixed that issue
(and maybe introduced other breakage while doing it).

Feedback welcome!
Tassilo