bug#33796: 27.0.50; Use utf-8 is all our Elisp files

[Eli Zaretskii <eliz@gnu.org>]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Tue, 18 Dec 2018 13:46:45 -0500
> 
> Since Emacs-25, UTF-8 is the standard/default encoding for Elisp files.
> The attached patch changes the few non-utf-8 Elisp files to use utf-8.
> 
> AFAICT, this patch is safe in the sense that the resulting .elc files
> are identical (except for titdic-cnv.elc obviously, since I not only
> changed the encoding but also the code, but I also checked that the
> change of encoding itself does not affect the resulting .elc file).

The .elc files are identical, but visiting the .el files will (or
might) use different fonts, because the charset information is lost.
(You will see that I jumped through some hoops to do something similar
with etc/HELLO.)

So I don't think we should make this change without considering
whether the charset information is as important nowadays as it was
back then.  And I'm not really sure who to ask about this.