bug#13936: Default to UTF-8 for most Emacs source files

[Paul Eggert]

On 03/13/2013 08:48 PM, handa wrote:
> The same can be said for etc/tutorials/TUTORIAL.ja.
> This file should be shown in a proper Japanese font
> even for a user not in Japanese lang. env.

For a file like TUTORIAL.ja, the Local Variables: section
can specify a preferred charset.  Wouldn't this address the issue for
non-Japanese users?  Something like this, say:

;;; Local Variables:
;;; coding: utf-8
;;; eval: (set-charset-priority 'japanese-jisx0208)
;;; End:

Or perhaps we can come up with a better way to specify a file-local
charset priority.