[bug #57448] groff will not break a line at a hard hyphen following some letter combinations

From	Dave <INVALID.NOREPLY@gnu.org>
Newsgroups	gnu.groff.bug
Subject	[bug #57448] groff will not break a line at a hard hyphen following some letter combinations
Date	2020-05-14 02:41 -0400
Message-ID	<mailman.83.1589438461.3227.bug-groff@gnu.org> (permalink)
References	(2 earlier) <20191219-220856.sv93119.28405@savannah.gnu.org> <20191220-043627.sv93119.51933@savannah.gnu.org> <20191222-233745.sv93188.73578@savannah.gnu.org> <20191223-065039.sv93119.93277@savannah.gnu.org> <20200514-014059.sv93119.99040@savannah.gnu.org>

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Follow-up Comment #6, bug #57448 (project groff):

And it turns out that kern pairs need not even exist between every letter of a
hyphen-containing phrase to trigger the bug.  For instance, the string
"major-Y-axis" has only two kern pairs in the Times typeface: between "r" and
"-", and "Y" and "-".  Yet groff will break at neither hyphen:


seq -w 0 99 | xargs -I FRACTION printf '.br\n.ll 3.FRACTIONc\nIt can show the
major-Y-axis line\n' | groff -a | fgrep It | uniq


The problem disappears if the Y is turned into an X.

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[bug #57448] groff will not break a line at a hard hyphen following some letter combinations Dave <INVALID.NOREPLY@gnu.org> - 2020-05-14 02:41 -0400

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