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

[Jean Louis]

* Eli Zaretskii <eliz@gnu.org> [2020-11-11 18:57]:
> > Cc: Eli Zaretskii <eliz@gnu.org>, monnier@iro.umontreal.ca, 
> > spacibba@aol.com,
> >  Andrii Kolomoiets <andreyk.mad@gmail.com>, emacs-devel@gnu.org
> > From: martin rudalics <rudalics@gmx.at>
> > Date: Wed, 11 Nov 2020 16:49:54 +0100
> > 
> > The application has to make sure that when it asks for user input, the
> > entire prompt can be seen in the minibuffer window without truncating
> > lines.  Emacs has to provide some reasonable minimum space for the
> > minibuffer window - usually one canonical frame line.  If an application
> > asks for more than can be displayed in the minibuffer window, that
> > application has a bug.
> 
> In that case, most uses of icomplete-vertical and any similar features
> "have bugs".  There's no chance in the world you can display all the
> files in a non-trivial directory vertically in a mini-window without
> losing some of the file names and/or some of the prompt.

One can display it in other window and where line is too long, user
can use keys like arrows right/left to go to side depending of the
language, to see the remaining of the line.