bug#38457: 27.0.50; dabbrev-expand regression due to message change

[Eli Zaretskii]

> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Wed, 25 Dec 2019 18:30:57 +0200
> Cc: 38457@debbugs.gnu.org
> 
> > Code in set-minibuffer-message was copied from minibuffer-message
> > where handling of the cursor and after-string overlay was intentional.
> 
> Since after-string is used, shouldn't it always appear *after* the cursor?

No.  The cursor is always displayed after the overlay string.  If you
want it to do anything else, you need to put a 'cursor' property on
the overlay string.