Re: emacs rendering comparisson between emacs23 and emacs26.3

[Eli Zaretskii]

> Cc: address@hidden, address@hidden, address@hidden, address@hidden
> From: martin rudalics <address@hidden>
> Date: Wed, 8 Apr 2020 10:38:30 +0200
> 
> What's bothering me more is that when I put an overlay somewhere in a
> buffer and eventually remove it, underlying text properties provided by
> the font locking mechanism are never restored unless I explicitly edit
> the line where such properties should be seen.  Apparently so, because
> font locking does not trigger when overlays get removed because that
> does not count as a buffer change.

Overlay changes do count as buffer changes, for the purposes of
redisplay, so a bug report with a recipe will be appreciated.