groff_man*(7): Revise history.

The changes I attributed to DWB 1.0 occurred earlier, in Unix System
III.

1 files changed, 13 insertions, 13 deletions

diff --git a/tmac/groff_man.7.man.in b/tmac/groff_man.7.man.in
index 3e06e853a..532b6ea4b 100644
--- a/tmac/groff_man.7.man.in
+++ b/tmac/groff_man.7.man.in
@@ -3239,9 +3239,20 @@ no registers were documented.
 .
 .P
 .B .UC
-appeared in 3BSD (1980) and
+appeared in 3BSD (1980).
+.
+.\" per https://archive.org/details/\
+.\" bitsavers_attunixSysalRelease3Jun80_33886798
+Unix System\~III (1980) introduced
 .B .P
-in Unix System\~III (1980).
+.\" ...and de-documented .LP...
+and exposed the registers
+.B IN
+and
+.BR LL ,
+.\" ...as well as \n[PD], which we implement but don't expose.
+which had been internal to Seventh Edition Unix
+.IR man .
 .
 .\" This inference is based on RCS idents of "PWB Manual Entry Macros"
 .\" from various forms of "an.src" distributed with System III (an.src
@@ -3263,17 +3274,6 @@ and
 .B rq
 strings.
 .
-.\" per <https://minnie.tuhs.org/pipermail/tuhs/2022-March/025544.html>
-.\" and <https://minnie.tuhs.org/pipermail/tuhs/2022-March/025545.html>
-Documenter's Workbench 1.0 (1984) exposed the
-.B IN
-and
-.B LL
-registers,
-which had been internal to Seventh Edition Unix
-.IR man .
-.\" ...as well as a PD register, which we use but don't expose.
-.
 .\" The SunOS inferences here and below are based on inspection of SunOS
 .\" 2.0 (May 1985), 3.2 (September 1986), 3.5 (January 1988), and 4.0
 .\" (December 1988) tape archives (only).