bug#24902: 25.1; C-x = for Unicode

[Robert Pluim]

>>>>> On Mon, 24 Jan 2022 12:00:31 +0100, Lars Ingebrigtsen <larsi@gnus.org> 
>>>>> said:

    Lars> Making a format-spec thing for `C-x =' would be fine by me.

As long as that was for 'C-x =' only, and not 'C-u C-x =' I guess that
would be OK, although the only possible use I would have for it would
be to not show the octal. The octal is a very minor irritant, so Iʼm
not sure itʼs worth the effort.

Robert
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