[groff] 03/12: groff_man*(7): Update history of \*[Tm].

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit 1d3b8045e7e8ae2cb61c210e973f15a70466ec6c
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Mon Aug 24 19:26:47 2020 +1000

    groff_man*(7): Update history of \*[Tm].
    
    * tmac/groff_man.7.man.in (Description/History): The Tm string is eight
      years older than I thought.  It seems to have come from PWB/UNIX 2.0,
      or maybe a field upgrade thereof.
    
    (Pleasantly, this allows me to efface my embarassing mistake of writing
    "Ultrix 11" as if "11" were a version number.  I should have known
    better given that I knew about the MACRO-11 assembler and the popularity
    circa 1980 of suffixing software products with a nod to the supported
    ISA ("-80" for 8080 and Z80 machines, "-65" for the 6502, "-68" for
    m68k, and so on).  The first DEC machine I ever actually saw in person
    was an Alpha.  Yup, I'm a whipper-snapper.)
---
 tmac/groff_man.7.man.in | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/tmac/groff_man.7.man.in b/tmac/groff_man.7.man.in
index 0b31e39..90e0c78 100644
--- a/tmac/groff_man.7.man.in
+++ b/tmac/groff_man.7.man.in
@@ -2795,6 +2795,18 @@ appeared in 3BSD (1980) and
 .B .P
 in Unix System\~III (1980).
 .
+.\" This inference is based on RCS idents of "PWB Manual Entry Macros"
+.\" from various forms of "an.src" distributed with System III (an.src
+.\" 1.35, dated 5/6/80, lacks the Tm string), Version 10 Research Unix
+.\" (1.36, dated 11/11/80, has it), Ultrix 3.1 (1.37, dated 12/19/80,
+.\" retains it) and "pdp11v" (also 1.37).  One source (S. S. Pirzada)
+.\" says PWB 2.0 was released in June 1979.  I found no record of later
+.\" releases and cannot account for the discrepancy (field updates?).
+.\" -- GBR
+PWB/UNIX 2.0 (1980) added the
+.B Tm
+string.
+.
 4BSD (1980) added
 .\" undocumented .VS and .VE macros to mark regions with 12-point box
 .\" rules (\[br]) as margin characters, as well as...
@@ -2818,10 +2830,6 @@ Version\~9 Unix (1986) introduced
 and
 .BR .EE .
 .
-Ultrix\~11 (1988) added the
-.B Tm
-string.
-.
 SunOS\~4.0 (1988) may have been the first to support
 .BR .SB .
 .\" ...which appeared in a few man pages distributed in 4.3BSD-Reno and