bug#17554: 24.3.91; [Regression] re-usage of dired *Marked Files* buffer window

[Eli Zaretskii]

> Date: Thu, 22 May 2014 21:17:27 -0500
> From: "Roland Winkler" <winkler@gnu.org>
> Cc: 17554@debbugs.gnu.org
> 
> Then it splits once more the main window for the *Completions*
> buffer.  So I get a *Completions* window which is typically large
> enough to display the complete *Completions* buffer.

That's a side effect of popping a new window.  Current Emacs reuses
the same window, so it doesn't resize.