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From: Michael Heerdegen <michael_heerdegen@web.de>
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Subject: Re: Colourising tex keywords
Date: Tue, 11 Jan 2022 17:41:28 +0100
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Emanuel Berg via Users list for the GNU Emacs text editor
<help-gnu-emacs@gnu.org> writes:

> See if this works in Emacs Lisp mode, if/when it does (it does
> here) do the same for your mode, if it doesn't work there,
> well then something is up ...

Yes, that code works for me, too.

Maybe font-lock-mode is just not enabled in the tested buffer or so.

Michael.