bug#59067: 29.0.50; Exexpected overlay order in `overlays-in' return value

[Eli Zaretskii]

> Date: Fri, 11 Nov 2022 04:13:03 +0200
> Cc: 59067@debbugs.gnu.org, Ihor Radchenko <yantar92@posteo.net>,
>  Eli Zaretskii <eliz@gnu.org>
> From: Dmitry Gutov <dgutov@yandex.ru>
> 
> Another place which might be important is the order in which the 'face' 
> property is applied by Emacs (with 'priority' being equal).

The display code sorts the overlays before applying them, so this is
covered.