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bug#34898: 24.4; `message-separator' face only works for default value o

From: Eric Abrahamsen
Subject: bug#34898: 24.4; `message-separator' face only works for default value of `mail-header-separator'
Date: Mon, 18 Mar 2019 11:46:01 -0700
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

"Basil L. Contovounesios" <address@hidden> writes:

> Eric Abrahamsen <address@hidden> writes:
>> The value of `mail-header-separator' gets added to
>> `message-font-lock-keywords', which does the actual fontification. Using
>> setq to change the value of `mail-header-separator' did not change the
>> font lock keyword, despite setting the variable before message.el is
>> loaded (or is it pre-loaded?). Using the customize interface to set
>> `mail-header-separator' *does* work as expected.
> 0. emacs -Q
> 1. (setq mail-header-separator "--") C-j
> 2. C-x m
> Note that setting mail-header-separator before loading message.el works
> as expected.
> 3. M-x customize-variable RET mail-header-separator RET
> 4. Change value from "--" to "--foo--"
> 5. C-c C-c
> 6. C-x m
> Note that "--foo--" gets inserted, but message-font-lock-keywords still
> holds the value that mail-header-separator had at the time message.el
> was loaded.
> Since mail-header-separator lacks a custom setter, it makes no
> difference whether you use setq or Customize, so long as its value is
> changed before message.el is loaded.  Otherwise, you have to reevaluate
> and reapply message-font-lock-keywords.

I didn't try with emacs -Q, probably something in my setup ends up
loading message.el at startup.


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