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[groff] 06/10: groff_man*(7): Correct and clarify EX/EE.

From: G. Branden Robinson
Subject: [groff] 06/10: groff_man*(7): Correct and clarify EX/EE.
Date: Mon, 19 Dec 2022 21:50:50 -0500 (EST)

gbranden pushed a commit to branch master
in repository groff.

commit 08cd7820ef39779e6439e64c3ff1975edaa277b1
Author: G. Branden Robinson <>
AuthorDate: Mon Dec 19 12:09:35 2022 -0600

    groff_man*(7): Correct and clarify EX/EE.
    * Research Unix and its descendants' EX/EE _did_ manipulate filling, but
      not hyphenation.  (DWB apparently forked from Research/Kernighan troff
      about 1987, but some effort to keep sync was undertaken.)
    * Solaris troff is an oddball as always.
    * Tighten wording.
 tmac/ | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/tmac/ b/tmac/
index e90c338f2..de7db409b 100644
--- a/tmac/
+++ b/tmac/
@@ -648,24 +648,18 @@ before the spaces.
 .\" Also see subsection "History" below...
-These macros are extensions,
-introduced in Ninth Edition Research Unix,
-to the original
-.I man
+These macros are extensions introduced in Ninth Edition Research Unix.
-Many systems running
+Systems running that
+.IR troff , \" AT&T Research Unix
+or those from
 Heirloom Doctools,
 or Plan\~9
 .I troff
 support them.
-.\" Solaris 10 troff does not support .EX/.EE.
-.\" Plan 9 troff does, but its implementation doesn't manipulate filling
-.\" or hyphenation, so AT&T Unix's probably didn't either.
-.\" Neatroff doesn't ship (m)an macros.
+.\" Solaris 10 troff does not support .EX/.EE.  Neatroff doesn't ship
+.\" (m)an macros.
 To be certain your page will be portable to systems that do not,
 copy their definitions from the

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