bug#40687: Missing right border on composed text used in 'display property

[Eli Zaretskii]

> Cc: 40687-done@debbugs.gnu.org
> From: Clément Pit-Claudel <cpitclaudel@gmail.com>
> Date: Fri, 24 Apr 2020 10:01:43 -0400
> 
> On 24/04/2020 08.26, Eli Zaretskii wrote:
> > Great, so I'm closing this bug.  Thanks to all who supported the
> > testing of the fix.
> 
> Thanks for your hard work.

Thanks for an interesting use case that happened to teach me several
things I didn't know.