Re: Utf8 symbols in completing-read completion item

[Eli Zaretskii <eliz@gnu.org>]

> Date: Thu, 20 Oct 2022 22:00:31 +0000
> From: Heime <heimeborgia@protonmail.com>
> Cc: Heime via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>
> Nevertheless, my question is more focused on the best way to insert
> utf8 characters in COLLECTION.  Is it acceptable to include utf8 characters
> in COLLECTION?  From where does one copy the utf8 characters compatible with
> emacs?

To avoid confusion, please use the correct terminology.  There's no
such thing as "utf8 characters"; UTF-8 is an _encoding_ used to
serialize Unicode character codepoints into a stream of bytes that can
then be written to a file or send via the network.  IOW, UTF-8 is a
sequence of one or more bytes that represent a Unicode codepoint.  The
correct terminology is "Unicode characters" or "non-ASCII characters"
(since you mean characters beyond the ASCII range).  Unicode
character codepoints are 32-bit entities, whereas their UTF-8 encoding
can take between 1 and 4 bytes.  Suggested reading:

  https://en.wikipedia.org/wiki/UTF-8

Also, _all_ Unicode characters are compatible with Emacs.