bug#33571: 26.1.90; Artifacts in echo area

[Eli Zaretskii <eliz@gnu.org>]

> Cc: nyc4bos@aol.com, 33571@debbugs.gnu.org
> From: Paul Eggert <eggert@cs.ucla.edu>
> Date: Sun, 2 Dec 2018 09:43:26 -0800
> 
> Eli Zaretskii wrote:
> > Forget it, I reproduced this in texinfo-mode.
> > 
> > This is indeed caused by the recent change in keyboard.c.  Paul, could
> > you please take a look?
> 
> What's the reproducer you used?

Visit a Texinfo file, then type "C-c C-c c".

> I tried visiting files in texinfo mode and 
> couldn't see any difference in behavior. For example, if I start Emacs this way:
> 
> src/emacs -Q doc/lispref/windows.texi
> 
> and then type 'C-c /' quickly, it doesn't echo, and if I type slowly it does 
> echo, and this is true for me in the emacs-26 branch regardless of whether the 
> patch is installed.

Hmm... you are right.  I guess I somehow unconsciously typed quickly
when testing without the patch and slowly with it.

I've reinstated the change on the emacs-26 branch.  Sorry for the
noise.

I guess the bug should be closed as expected behavior, as I see that
all the way back to Emacs 22.1.