bug#68246: 30.0.50; Add non-TS mode as extra parent of TS modes

[Eli Zaretskii]

> From: Stefan Kangas <stefankangas@gmail.com>
> Date: Mon, 8 Jan 2024 11:18:41 -0800
> Cc: 68246@debbugs.gnu.org, casouri@gmail.com, joaotavora@gmail.com
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Please don't call it "language".  That'd be confusing.  LSP is about
> > programming languages, so "language" is natural there.  But in Emacs,
> > a major mode is more general than that.  For example, it is not
> > unthinkable to consider mail-mode to be the extra-parent of
> > message-mode (or vice versa) -- but what is the "language" in that
> > case?
> 
> Isn't the language for such modes in this paradigm just the empty set?

No.  The "language" there is "text", except that it's silly to call
that "language".