bug#39115: 26.3; eww consecutive links look like one link with mouse-over

[Eli Zaretskii]

> From: Stephen Berman <stephen.berman@gmx.net>
> Cc: larsi@gnus.org,  ynyaaa@gmail.com,  39115@debbugs.gnu.org
> Date: Wed, 22 Jan 2020 21:44:11 +0100
> 
> Why do overlays and text properties differ on this?

That's a side effect of different implementations.  Text properties
are kept as intervals, and so two adjacent intervals with the same
value of the property are indistinguishable from a single interval
covering both stretches of text (and AFAIR we actually convert them
into a single interval when we see fit).  By contrast, overlays are
kept in a list, and you can have any number of them at the same
position with the same property (which is why you can have, e.g., two
or more after-strings at EOB, and they will both be displayed).