[groff] 07/09: groff_mm(7): Restore and expand `DT` string docs.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit d14f98d023e644bc2d602aa9a56fa525c4ef579c
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Tue Aug 10 01:40:18 2021 +1000

    groff_mm(7): Restore and expand `DT` string docs.
    
    Historically, `DT` was a publicly visible string.  Thanks to Nate
    Bargmann for pointing this out.
    
    https://lists.gnu.org/archive/html/groff/2021-08/msg00045.html
---
 contrib/mm/groff_mm.7.man | 30 ++++++++++++++++++++++++++----
 1 file changed, 26 insertions(+), 4 deletions(-)

diff --git a/contrib/mm/groff_mm.7.man b/contrib/mm/groff_mm.7.man
index f9d521e..163ecba 100644
--- a/contrib/mm/groff_mm.7.man
+++ b/contrib/mm/groff_mm.7.man
@@ -1981,8 +1981,9 @@ normal operation again.
 .
 .TP
 .BR ISODATE\~ [ 0 ]
-Change the date used by some cover sheet and memorandum types to
-ISO\~8601 format;
+Use ISO\~8601 format for the date string
+.B DT
+used by some cover sheet and memorandum types;
 that is,
 .IR YYYY - MM - DD .
 .
@@ -1992,8 +1993,10 @@ to be effective.
 .
 If given an argument
 .RB of\~ 0,
-U.S.\& traditional date format is used
-(this is the default).
+the traditional date format for the
+.I groff
+locale is used;
+this is also the default.
 .
 .
 .TP
@@ -3390,6 +3393,25 @@ A string containing the word \[lq]APPENDIX\[rq].
 .B Apptxt
 The current appendix text.
 .
+.
+.TP
+.B DT
+The date;
+set by the
+.B ND
+macro
+(defaults to the date the document is formatted).
+.
+The format is the conventional one for the
+.I groff
+locale,
+but see the
+.B ISODATE
+macro and
+.B Iso
+register.
+.
+.
 .TP
 .B EM
 Em dash string