bug#34952: files with/out final newline look the same no matter what

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: contovob@tcd.ie,  34952@debbugs.gnu.org,  jidanni@jidanni.org
> Date: Fri, 07 Aug 2020 14:02:31 +0200
> 
> Lars Ingebrigtsen <larsi@gnus.org> writes:
> 
> > Oh, yeah, that makes sense.  I'll fix that.
> 
> Actually, I don't know how.  How do you ask, when you're in the
> font-lock machinery, what the original point was?  Like here:
> 
>        ,@(when (memq 'missing-newline-at-eof whitespace-active-style)
>            ;; Show missing newline.
>            `(("[^\n]\\'" 0 (if .... something) t)))))

What, calling 'point' doesn't work?  Then maybe Stefan could help us
out.

> By the way, have I whined about how difficult debugging font-lock stuff
> is?  I can't put a `debug' in there, for instance, to examine the
> calling sequence, which would probably tell me what I need to know.

I think Stefan posted some advice at some point?