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

From: Eli Zaretskii <[email-masked]>
Date: Thu, 23 Apr 2020 18:49:10 +0300

> From: Stephen Berman <[email-masked]>
> Date: Fri, 17 Apr 2020 22:33:48 +0200
> Cc: [email-masked]
> 
> I see the same thing, but I noticed that when you add a space to
> composed characters of the display property, ie.:
>  (compose-chars ?a '(Br . Bl) ?b ? )
> then right side border appears.

Yes, because the bug only happened when a display string _ended_ in a
composition.