GNU bug report logs - #77173
[PATCH] Instruct users to use customize or setopt for user options that have :set-er

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Visuwesh <visuweshm <at> gmail.com>
Cc: 77173 <at> debbugs.gnu.org
Subject: bug#77173: [PATCH] Instruct users to use customize or setopt for user options that have :set-er
Date: Sat, 22 Mar 2025 14:59:23 +0200

> From: Visuwesh <visuweshm <at> gmail.com>
> Date: Sat, 22 Mar 2025 17:50:31 +0530
> 
> Seeing the discussion in bug#77157, and another recent discussion about
> the same, WDYT about the attached that automatically adds the "use
> setopt" filler text?
> 
> This is what doc-view-epub-font-size says with the patch applied:
> 
>     doc-view-epub-font-size is a variable defined in ‘doc-view.el’.
> 
>     Its value is nil
> 
>     Font size in points for EPUB layout.
> 
>       This variable was introduced, or its default value was changed, in
>       version 29.1 of Emacs.
>       You can customize this variable.
>       Setting this variable directly will not usually take effect;
>       use either customize or ‘setopt’, or call ‘doc-view-custom-set-epub-font-size’.
> 
> The word 'customize' in the last line is buttonised the same way as the
> one in "You can customize this variable'.

What does this do when the setter is an anonymous function?  We have
quite a lot of these when a defcustom needs a :set function.

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