bug#59141: 28.1.90; Face :extend when all the line but trailing \n is invisible

[Eli Zaretskii]

> Cc: 59141@debbugs.gnu.org, kevin.legouguec@gmail.com, juri@linkov.net
> From: Al Haji-Ali <abdo.haji.ali@gmail.com>
> Date: Fri, 11 Nov 2022 12:30:13 +0000
> 
> Note that when the 'display is "\n" only, the ellipses are not shown. 
> Nevertheless, both behaviours go against the documentation of `invisible-p` 
> where it says that if t, "the text would be replaced by an ellipsis", so I am 
> not sure if showing the 'display text is unintended.

If 'display' and 'invisible' properties start at the same buffer
position, the 'display' property "wins", because the display engine
handles it before it handles the invisible property.