Re: Disambiguate modeline character for UTF-8?

[Ulrich Mueller]

>>>>> On Thu, 06 Jul 2023, Eli Zaretskii wrote:

>> From: Ulrich Müller <ulm@gentoo.org>
>> Cc: emacs-devel@gnu.org
>> Date: Thu, 06 Jul 2023 20:44:05 +0200
>> 
>> --- a/lisp/language/cyrillic.el
>> +++ b/lisp/language/cyrillic.el
>> @@ -126,7 +126,10 @@ 'cp878
>> (define-coding-system 'koi8-u
>> "KOI8-U 8-bit encoding for Cyrillic (MIME: KOI8-U)"
>> :coding-type 'charset
>> -  :mnemonic ?U
>> +  ;; This used to be ?U which collided with UTF-8.  ?K is also used
>> +  ;; for Korean, but it shouldn't be a real conflict since Cyrillic
>> +  ;; and Hangul can be disambiguated from context.
>> +  :mnemonic ?K

> K is not a good idea, for 2 reasons:

>   . the KOI8 family includes 3 encodings, not 1
>   . U in koi8-u stands for "Ukraine", so replacing it with K will
>     probably be frowned upon

The K (for all KOI8 variants) was actually suggested by a person from
Ukraine, back in 2020:
https://lists.gnu.org/archive/html/emacs-devel/2020-08/msg01010.html

> How about using У instead?  (Assuming using non-ASCII works there; the
> code seems to allow that.)

I've just tested a patch with current master, and for me the У works
both in an X frame ("У" in the mode line), in a text terminal under X
("UUУ") and in the Linux console ("UUУ").

Can we assume that users have the necessary fonts installed?