Le dimanche 03 avril 2022 à 08:14, Eli Zaretskii <eliz@gnu.org> a 
écrit :

>> From: Pierre Téchoueyres <pierre.techoueyres@free.fr>
>> Cc: info@protesilaos.com, 54598@debbugs.gnu.org, larsi@gnus.org
>> Date: Sat, 02 Apr 2022 21:48:05 +0200
>> 
>> > The only difference between systems (unrelated to MS-Windows 
>> > vs
>> > GNU/Linux differences) regarding this display might be 
>> > related to
>> > whether your default font supports the U+2502 character.
>> 
>> But it's the same font on both systtems. I started emacs with 
>> the 
>> following args to reproduce the bug and take the screenshots :
>> #+begin_src sh
>> emacs -q --no-site-file --no-site-lisp --no-splash -fn 
>> "-*-DejaVu 
>> Sans Mono-normal-r-*-*-12-*-*-*-c-*-iso8859-1"
>> #+end src
>> 
>> And even if you suppress the (setq ...) which define the 
>> character
>> the result is still the same : a thin line on Gnu/Linux an 
>> wider one
>> on Windows.
>
> If you type that character into the buffer text on both systems, 
> does
> it look the same?
yes see the attached images.

1) show you that the width is larger on Windows
2) show you that the characters are the same