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From: Doug McIlroy <doug@cs.dartmouth.edu>
Newsgroups: gnu.groff.bug
Subject: eqn mishandles quoted strings in macro arguments
Date: Tue, 10 Mar 2020 21:39:09 -0400
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Xref: csiph.com gnu.groff.bug:1767

Eqn does not take quotes into account when parsing macro
arguments. Example:
        .EQ
        define f % $1 %
        f("a,b")
        .EN
Eqn thinks the call of f has two arguments, each with an
unmatched quote. This interpretation violates the plain
meaning of this statement in classic (e.g v7 and v10)
man pages for eqn: `Strings enclosed in double quotes " "
are passed through untouched.' (Full disclosure: v7
eqn did not support macros with arguments; v10 eqn did.)

Doug McIlroy