bug#60511: 29.0.50; treesit-ready-p should not emit warning by default

[Eli Zaretskii <eliz@gnu.org>]

> From: Juri Linkov <juri@linkov.net>
> Cc: casouri@gmail.com,  stefankangas@gmail.com,  60511@debbugs.gnu.org
> Date: Sun, 08 Jan 2023 19:35:27 +0200
> 
> >> >> I can make treesit-ready-p not emit any warning by default, and change
> >> >> the quiet parameter to WARN, and accept either 'warn or ‘message.
> >> >>
> >> >> Basically:
> >> >>
> >> >> (treesit-ready-p lang) => t/nil
> >> >> (treesit-ready-p lang 'warn) => t/emit warning
> >> >> (treesit-ready-p lang 'message) => t/message
> >> >>
> >> >> Eli, WDYT?
> >> >
> >> > I think the default should be to emit a warning, like we do now.
> >>
> >> Then how users could change this default?
> >
> > In what situation?
> >
> > If they invoke the mode, they aren't supposed to disable the warning,
> > and they cannot.
> 
> In a situation when they want simply to visit a file without using
> tree-sitter features, and that visit won't require from them
> customization with modifying auto-mode-alist, etc.

This will soon become a non-issue, as I plan on removing all the TS
modes from auto-mode-alist.  Only loading the mode will add it back to
the alist.  So there will be no surprises, and no need to conceal the
warning.