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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Escaping a string for substitute-command-keys
Date: Sat, 05 Oct 2019 18:59:23 +0300
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Cc: cpitclaudel@gmail.com, emacs-devel@gnu.org
To: Stefan Monnier <monnier@iro.umontreal.ca>
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> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: Clément Pit-Claudel <cpitclaudel@gmail.com>,
>   emacs-devel@gnu.org
> Date: Sat, 05 Oct 2019 11:05:06 -0400
> 
> > Having read help-at-pt.el, I now don't understand why we need that
> > package, since help-echo can be easily displayed in the echo area as
> > well.
> 
> The issue isn't "tooltip frame vs echo area" but "mouse vs keyboard", IIRC.

Not entirely, because tooltips can be shown due to keyboard commands,
e.g. in TTY menus.