Subject: Re: bug#13817: 24.3.50; Disabling whitespace-mode that was enabled in sgml-mode-hook breaks font-lock

From: Stefan Monnier <[email-masked]>
Date: Tue, 19 Mar 2013 09:02:34 -0400

>>> On the surface, the reason for this is that when whitespace-mode is being
>>> turned on in the hook, font-lock-keywords is still nil, and so nil is
>>> saved in whitespace-font-lock-keywords.
>> whitespace.el should probably use font-lock-remove-keywords instead.
> That helped, thank you.
> I left the disabling/enabling of font-lock-mode there, because otherwise the
> changes in highlighting are not visible until the buffer is modified.

Supposedly `font-lock-fontify-buffer' is meant to do that without
disabling+enabling.

        Stefan