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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