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Re: luatex problems with texinfo.tex

From: Werner LEMBERG
Subject: Re: luatex problems with texinfo.tex
Date: Thu, 31 Dec 2015 14:48:29 +0100 (CET)

> So here's what's happening. When @documentencoding UTF-8 is given,
> it makes bytes 128-255 active.  However, for LuaTeX, it's actually
> making characters 128-255 active.

Do we need active characters in that range at all for luatex (and
xetex)?  The UTF8 support (this is, the code that converts UTF-8 byte
sequences to Unicode LICR forms) in texinfo.tex should be simply
skipped since it is unnecessary.

> The section and paragraph marks have a character number less than
> 256 in Unicode, so those characters are made active. The obelisk and
> diesis marks have character numbers more than 256, so they aren't
> made active and are set as normal characters.

Note that there is another bug: For 8bit engines, the glyphs for † and
‡ are taken from other fonts, but this substitution mechanism fails
for both luatex and xetex – a simple solution would be to use the CM
super fonts instead of 8bit Computer Modern.


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