Re: Consistent face for keys in *Help* and `substitute-command-keys'

[Eli Zaretskii]

> From: Stefan Kangas <stefan@marxist.se>
> Date: Thu, 25 Feb 2021 10:45:42 -0600
> Cc: larsi@gnus.org, emacs-devel@gnu.org
> 
> 0. emacs -Q
> 1. M-x fundamental-mode RET
> 2. M-: (insert (propertize "foo" 'help-echo "foo \\[forward-line]")) RET
> 
> No visible effect on the tooltip --with-x-toolkit={gtk,lucid,athena,no}.

And the face for keys is defined how?