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From: "Eli Zaretskii" <eliz@is.elta.co.il>
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Subject: Re: Gnus coming with Emacs 21pre-release: iso-8859-{1,15}
Date: Fri, 27 Jul 2001 11:45:18 +0300
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> From: Karl Eichwalder <keichwa@gmx.net>
> Date: 27 Jul 2001 07:10:57 +0200
>
>   value of $LC_ALL: nil
>   value of $LC_COLLATE: C
>   value of $LC_CTYPE: nil
>   value of $LC_MESSAGES: nil
>   value of $LC_MONETARY: nil
>   value of $LC_NUMERIC: nil
>   value of $LC_TIME: nil
>   value of $LANG: de_DE.ISO-8859-1
>   locale-coding-system: iso-latin-1
>   default-enable-multibyte-characters: t
>
> First, yes, I didn't set all the LC_ variable mentioned above.
> Nevertheless assuming "nil" is wrong; they are considered to inherit
> their values from LANG if not set separately.

This information is for our consumption; it doesn't imply that Emacs
behaves contrary to what you expect.  LANG's value is printed, and
whoever will need this information for tracking down a bug is supposed
to know about the inheritance rules.

> If I start Emacs 21pre under the locale
> 
>     LANG=de_DE.ISO-8859-15
> 
> and reply to a iso-8859-1 encoded message (containing umlaut letters),
> my reply message is arranged as a multipart message even if there's no
> ambiguity involved.
> 
> My proposal: by default send out such a message UTF-8 encoded

This should IMHO be optional at this time, since Unicode support in
the stock Emacs 21 distribution (without add-ons such as Mule-UCS) is
limited and incomplete.  For starters, AFAIK, Emacs cannot encode
8859-15 characters as UTF-8 (see the commentary in utf-8.el) unless
those characters came from a UTF-8 encoded source to begin with, and
thus are stored in the buffer as mule-unicode-NNNN characters.
(Perhaps Gnus can do such conversions with its own code; but I'm
talking about core Emacs functionality here.)  This is not the kind of
support that we could IMHO offer users as the default.