bug#50564: 28.0.50; Display artifacting in package list

[Eli Zaretskii]

> Date: Mon, 13 Sep 2021 16:38:44 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 50564@debbugs.gnu.org
> 
> > From: Po Lu <luangruo@yahoo.com>
> > Cc: 50564@debbugs.gnu.org
> > Date: Mon, 13 Sep 2021 20:47:46 +0800
> > 
> > >   . which parts of the display are left on the screen
> > 
> > Parts of the names; I've attached three screenshots, of which
> > "before.png" depicts the package list before the bug is triggered,
> > "bug1.png" depicts the bug, and "correct.png" depicts the screen after
> > redraw-display.
> 
> That's list-packages, not finder-by-keyword.  I don't see the problem
> in the latter, but I do see in the former (and in other displays that
> use tabulated-list-mode, for example "C-x C-b").
> 
> I will look into this, thanks.

Should be fixed now, please test.