bug#70016: Emacs 29.3 treesit-parser-list function parameters differ from the master branch

[Eli Zaretskii <eliz@gnu.org>]

> From: Yuan Fu <casouri@gmail.com>
> Date: Wed, 27 Mar 2024 21:47:12 -0700
> Cc: Meow King <mr.meowking@anche.no>,
>  70016@debbugs.gnu.org
> 
> > On Mar 26, 2024, at 12:25 PM, Eli Zaretskii <eliz@gnu.org> wrote:
> > 
> >> Cc: casouri@gmail.com
> >> Date: Tue, 26 Mar 2024 11:23:00 +0800
> >> From:  Meow King via "Bug reports for GNU Emacs,
> >> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> >> 
> >> I think it may be a bug (accidentally change code?) so I report it here.
> >> 
> >> Emacs 29.3 treesit-parser-list only accepts one parameter (i.e. BUFFER),
> >> but the treesit-parser-list on the latest Master Branch doesn't change,
> >> accepting three optional parameters. 
> > 
> > According to "git log", it was a deliberate change.
> > 
> > Yuan, why did we change the signature, and why isn't tyhis called out
> > in NEWS?
> 
> I believe we only changed the signature from one optional arg to three optional args, on master. Treesit-parser-list never had one mandatory arg.
> 
> We changed the signature to three optional args to a) allow users to get parsers for a specific language, and b) allow users to get parsers with a specific tag. Parser tags are used by local parsers.
> 
> I should have added a NEWS entry, but apparently I forgot :-) Sorry about that. I’ll add it, along with other functions that I said I’ll wait a bit more before documenting (it’s about time).

Ping! Could you please do these documentation changes now?

Thanks.