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

[Eli Zaretskii]

> 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.