Re: [PATCH] Support "\n" in icomplete-separator

[Eli Zaretskii]

> Date: Wed, 11 Nov 2020 17:09:54 +0300
> From: Jean Louis <bugs@gnu.support>
> Cc: martin rudalics <rudalics@gmx.at>, Eli Zaretskii <eliz@gnu.org>,
>   emacs-devel@gnu.org, spacibba@aol.com, monnier@iro.umontreal.ca
> 
> Jumping mode line is the side effect that completion packages do not
> take in account.

If it annoys you so much, you can easily stop it from jumping.  See
the variable resize-mini-windows.