Subject: Re: bug#79279: 28.2; Combining characters cause formatting problems when showing CAP candidates

From: Eli Zaretskii <[email-masked]>
Date: Thu, 21 Aug 2025 21:19:12 +0300

> From: Juri Linkov <[email-masked]>
> Cc: Dmitry Safronov <[email-masked]>,  Stefan Monnier
>  <[email-masked]>,  [email-masked]
> Date: Thu, 21 Aug 2025 19:04:17 +0300
> 
> >> The text was indeed produced by the julia-mode package, namely by the
> >> `julia--latexsub-capf-list` function for creating a CAPF completion
> >> table for that mode.
> >> However, the list of completion candidates (based on that completion
> >> table) in the
> >> "*Completions*" buffer was produced by the Emacs core (`display-completion-list`
> >> function defined in `minibuffer.el`).
> >
> > But display-completion-list just shows the strings it gets as its
> > argument.  AFAIU, theses strings already include both the completion
> > candidate and its visualization (which causes the problem).  If that
> > is correct, then the code which generates those strings is the one we
> > need to fix.  Can you (or someone else of the people I CC) point to
> > the code which generates those strings?
> 
> This was already fixed in julia-mode long ago.
> The current version adds the preceding space character:
> 
>   :annotation-function (lambda (s)
>                          (concat " " (gethash s julia-mode-latexsubs)))
> 
> So there is no such problem anymore:

So you think we don't need to solve this in minibuffer.el for all the
users of this?