bug#60894: 30.0.50; [PATCH] Add treesit-forward-sexp

[Stefan Monnier]

>> My SMIE experience with it is that we really need a specific hook
>> for that if we want to avoid wonky behaviors in "corner" cases.
> A bug report with repro would probably help, I guess. Or you could start on
> that hook yourself.

I think `C-M-u` from within a LaTeX environment was one of the cases
where it misbehaved (tho that one is not using SMIE).

> Do you mean a hook like backward-up-list-function, or something smaller?

Something like that.  Maybe it could also be used for `expand-region`
and `thing-at-point` kind of purposes maybe and could work even for
treesit nodes that aren't "matching begin..end thingies".


        Stefan