bug#54598: 27.2; Bad interraction between modus-theme and hs-minor-mode

[Eli Zaretskii]

> From: Protesilaos Stavrou <info@protesilaos.com>
> Date: Thu, 31 Mar 2022 22:57:57 +0300
> Cc: 54598@debbugs.gnu.org, Lars Ingebrigtsen <larsi@gnus.org>
> 
> On 2022-03-31, 21:24 +0200, Pierre Téchoueyres <pierre.techoueyres@free.fr> 
> wrote:
> 
> >> Pierre, your suggestion to filter the custom-enabled-themes is better
> >> than what we have.  Do you want to send it to me as a patch?
> > What dou you think of the attached one ?
> 
> Installed it in my repo.  Thank you!  I was planning to prepare a
> release in the coming days and sync it with emacs.git.  Might do it
> tomorrow.  Is it okay for you if you wait a bit before this patch makes
> it to 'master'?
> 
> > Apart from that, do you know why the vertical line doesn't look the
> > same on Windows ?
> 
> Sorry, I don't know.  I do not have access to a Windows machine.

What is that "vertical line", and what is its look on MS-Windows as
opposed to other systems?