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From: "Alfred M. Szmidt" <ams@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: new coding system (was: Re: prettify symbols question)
Date: Fri, 13 Nov 2020 12:11:22 -0500
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To: Eli Zaretskii <eliz@gnu.org>
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Seems that it doesn't like it when you have:

  <U00B7>     /x00         MIDDLE DOT

but

  <U0000>     /x00         MIDDLE DOT

works.  According to the glibc manual, this should accept a UCS-4
value which U00B7 is.  Not sure what gives...