[bug #57594] sync hyphenation pattern files with TeX hyph-utf8 project and iconv them

[G. Branden Robinson]

Update of bug #57594 (project groff):

                 Summary: sync hyphenation pattern files with TeX versions =>
sync hyphenation pattern files with TeX hyph-utf8 project and iconv them

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Follow-up Comment #12:

[comment #11 comment #11:]
> [comment #9 comment #9:]
> > Yes.  If the hyphenation pattern files contain non-ASCII
> > characters, the localization file loads latin{1,2,9}.tmac as
> > appropriate before invoking `hpf` to load the pattern file.
> 
> Great!
> 
> > This mechanism is a bit of a dead end because the TeX hyph-utf8
> > project has migrated to UTF-8, and decoding of multibyte
> > character sequences is far beyond the .trin request's capabilities.
> 
> Right, but I asked this in the context of my proposal in comment #7; that
is, that in the groff tree we could iconv each UTF-8 TeX file to an
appropriate groff-digestible format before git committing it, at least until
the more ambitious solution outlined in comment #4 comes to pass.  This would
not be the prettiest solution, but it would be trivial to script.

Yes.  This seems like a tractable thing to do for groff 1.23.0.  Un-postponing
and goosing the severity.

I suppose comment #4 needs to become part of the larger UTF-8 effort, however
long that takes.

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