bug#44418: 28.0.50; Spliced variable not matched as symbol in isearch

[Eli Zaretskii]

> Cc: Basil Contovounesios <contovob@tcd.ie>, 44418@debbugs.gnu.org,
>  Stefan Monnier <monnier@iro.umontreal.ca>
> From: Mattias Engdegård <mattias.engdegard@gmail.com>
> Date: Wed, 21 Jun 2023 17:59:44 +0200
> 
> A tentative fix has been pushed to master. I didn't bother with a NEWS entry 
> but will be happy to add one if someone thinks it would be useful.

If this changes user-facing behavior or behavior of public functions,
I think we must call this out in NEWS, under "incompatible changes".

Thanks.