[bug #57594] sync groff hyphenation-pattern files with upstream TeX versions

[G. Branden Robinson]

Update of bug #57594 (project groff):

                Severity:              3 - Normal => 5 - Blocker            

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Follow-up Comment #3:

If this should go into the release checklist then we should add it there, in
FOR-RELEASE.

We should also write script(s) to verify the groff-cleanliness of the
hyphenation files.  This can easily take the form of one or more regression
tests like the 48 others we have.  The most obvious thing I can think of to do
is to have one test file for each supported groff locale which then calls .hla
(or uses my in-development internationalization patch, bug #59814).  If my
understanding is correct, an otherwise empty groff document will suffice to
provoke diagnostics from .hla if the hyphenation or exception files contain
unsupported constructs.  See src/roff/troff/env.cpp:hyphen_trie::hpf_getc and
src/roff/troff/env.cpp:hyphen_trie::read_patterns_file.

Once both of these are done, this ticket can be resolved.

In the meantime, it's a blocker.

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