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[groff] 15/23: groff_mm(7) (Macros): Add introductory material.

From: G. Branden Robinson
Subject: [groff] 15/23: groff_mm(7) (Macros): Add introductory material.
Date: Sat, 30 Jul 2022 14:53:45 -0400 (EDT)

gbranden pushed a commit to branch master
in repository groff.

commit b39d29a1dd00595e173623e6431a05f70b558068
Author: G. Branden Robinson <>
AuthorDate: Thu Jul 28 14:48:14 2022 -0500

    groff_mm(7) (Macros): Add introductory material.
 contrib/mm/ | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/contrib/mm/ b/contrib/mm/
index 626035554..99a2fef22 100644
--- a/contrib/mm/
+++ b/contrib/mm/
@@ -359,6 +359,28 @@ for instance with
 .SH Macros
 .\" ====================================================================
+An explicitly empty argument may be specified with a pair of double
+to call a macro
+.B XX
+with an empty second argument but non-empty first and third ones,
+you could input the following.
+\&.XX foo \[dq]\[dq] baz
+Macro names longer than two characters are GNU extensions;
+some shorter names were not part of DWB
+.IR mm 's
+published interface but are documented aspects of
+.I groff mm.
 .BI )E\  "level text"
 Add heading text

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