Eli Zaretskii <eliz@gnu.org> writes:

>> From: john muhl <jm@pub.pink>
>> Date: Sat, 16 Aug 2025 15:43:56 -0500
>> 
>> Add font-lock-comment-delimiter face to all the initial dashes in single
>> line comments. Some popular documentation styles recommend triple dashes
>> and it looks better to have all the dashes in the same face.
>
> Thanks, but shouldn't the code which moves point be in save-excursion
> in this case?  If not, why not?

I thought the font-lock machinery took care of it. If I followed
the code correctly then we eventually end up in
font-lock-default-fontify-syntactically which uses save-excursion.

Checking the position of point at the beginning of
lua-ts--comment-font-lock shows that it has already been moved (to
the end of the line/comment) before there is any chance to call
save-excursion from here so the position it would restore isn’t
where the user has the point at anyway.