bug#66944: 30.0.50; [PATCH] make calc parse fractions written using U+2044 FRACTION SLASH

[Eli Zaretskii <eliz@gnu.org>]

> From: Daniel Brooks <db48x@db48x.net>
> Cc: stefankangas@gmail.com,  66944@debbugs.gnu.org
> Date: Sat, 27 Jan 2024 05:11:33 -0800
> 
> > Please try rewriting these to avoid non-ASCII characters in Texinfo
> > source files, since processing those with TeX could cause problems.
> > Where possible, please use the special Texinfo commands described in
> > the "Insertions" chapter of the Texinfo manual and its sections.  If
> > some character cannot be written using ASCII characters as described
> > in that section, please just name it, as in "U+2044 FRACTION SLASH",
> > but don't include it verbatim.
> 
> Thanks, I hadn’t read that. Done.

Thanks, but I'm not sure @U{HEX} will always work in the printed
output.  Did you try to say "make calc.pdf" in doc/emisc/?  If not,
can you try that?

If you see errors about @U when generating PDF format, we will need to
make use of @U conditional by using @ifnottex, and in @iftex case omit
the @U{HEX} parts.

Thanks.