bug#56691: outline-minor-mode displays navigation arrow buttons as emojis

[Eli Zaretskii]

> From: Robert Pluim <rpluim@gmail.com>
> Cc: Eli Zaretskii <eliz@gnu.org>,  hello@paulwrankin.com,
>   56691@debbugs.gnu.org
> Date: Fri, 29 Jul 2022 15:48:59 +0200
> 
> Or have it be like face specifications in defface, which can check
> terminal properties.

That's what Lars implemented.  We are discussing how to check one such
properties -- the ability to show color Emoji.