bug#68762: 30.0.50; thing-at-point for an e-mail adress stops at "."

[Eli Zaretskii]

> From: Eshel Yaron <me@eshelyaron.com>
> Cc: rpluim@gmail.com,  philipk@posteo.net,  mail@titusmueller.de,
>   68762@debbugs.gnu.org
> Date: Thu, 01 Feb 2024 12:10:35 +0100
> 
> > Eshel, would you like to add some tests for this?
> 
> Sure, I'm attaching below a patch with a slightly cleaner implementation
> and a couple of tests.
> 
> Note that this is a complete rewrite of a function that mostly haven't
> changed since 1997, so please give it a close look before installing, in
> case there's some use case that didn't occur to me and isn't covered by
> the existing tests.

Thanks, I boldly went ahead and installed this on master.  Closing.