Re: emacs rendering comparisson between emacs23 and emacs26.3

[Eli Zaretskii]

> From: Stefan Monnier <address@hidden>
> Cc: address@hidden,  address@hidden,  address@hidden,
>   address@hidden,  address@hidden,  address@hidden
> Date: Wed, 08 Apr 2020 11:16:29 -0400
> 
> > This is in jit-lock-register, which is not called from jit-lock.el.
> > Does this mean that non-nil, non-t value of jit-lock-contextually is
> > like nil, unless the major mode calls jit-lock-register with its 2nd
> > argument non-nil?
> 
> Yes.
> 
> > And if so, why does the doc string mention font-lock-keywords-only and
> > doesn't mention jit-lock-register?
> 
> I think that's because that's written for the end-user rather than for
> the programmer: the end user doesn't know `jit-lock-register`, but it
> may know `font-lock-keywords-only`.
> 
> But maybe it's really just an artifact of history (originally, jit-lock
> and font-lock were more tightly linked).
> 
> > They seem to be at least theoretically independent?  If not, where's
> > their connection?
> 
> `font-lock-keywords-only` ends up passed by font-lock as
> 2nd arg to `jit-lock-register`.

Thanks, I tried to clarify the docs using this information.