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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: [Emacs-diffs] emacs-26 8f18d12: Improve documentation of decoding
	into a unibyte buffer
Date: Sat, 25 May 2019 23:15:18 +0300
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> Date: Sat, 25 May 2019 22:59:02 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: emacs-devel@gnu.org
> 
> The internal representation of the decoded text could include both.
> If some of the bytes in the original byte stream couldn't be decoded
> using the specified coding-system, they will be represented as raw
> bytes, using 2-byte sequences.  OTOH, Latin characters successfully
> decoded into codepoints less than 256 will take 1 byte.
                          ^^^^^^^^^^^^^
Oops, I meant less than 128.  Characters between 128 and 255 will be
represented as 2-byte UTF-8 sequences, of course.

> Again, this is just the internal representation of what was decoded.

Right.