bug#17497: 24.4.50; TTY menu glitches

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Cc: dmantipov@yandex.ru,  17497@debbugs.gnu.org
> Date: Thu, 22 May 2014 12:54:26 -0400
> 
> With no sleep, there are no glitches (that I could see).
> I certainly did not end up with that stray "--" off to the right.

IOW, sending commands at fast rate by leaning on the keys does produce
the glitches, but replaying the same commands at fast rate doesn't.
Curiouser and curiouser...