bug#21830: Useless messages from comint-previous-matching-input

[Eli Zaretskii]

> From: "John Wiegley" <jwiegley@gmail.com>
> Cc: jka@google.com,  21830@debbugs.gnu.org
> Date: Wed, 04 Nov 2015 13:24:57 -0500
> 
> >>>>> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> Since there's no way to make use of that information, I wouldn't mind 
> >> seeing
> >> it removed.
> 
> > It was there since 1993.
> 
> Well, hard to argue against that too. I can't say I feel any real passion for
> this issue, as there may be some who like the feedback they see upon pressing
> the key.

How about a defcustom to turn that off?