[Great news] The new version of #Groff typesetting system is out: 1.23.0
Official Web page: https://gnu.org/software/groff/ with many links.
And the best (imho) place for following the work &exchanges is the mailing list...with open archives: https://lists.gnu.org/archive/html/groff/
It has real gems inside, about Groff history +other tools (eqn, refer, pic,...) +Unix history.
Bravo to maintainer, B. Garrigues and lead developer, G. B. Robinson, and the contributors. The Groff system works so perfectly with text #format.
[Addendum] The source: "We are pleased to announce the availability of groff 1.23.0."
This is the beginning of the official email about Groff version 1.23.0, sent on Friday 2023-07-07 to the mailing list.
All the details are listed in this email, and archived at https://lists.gnu.org/archive/html/groff/2023-07/msg00051.html
So the announcement is an email text #format! :-)
Happy #groff typesetting system (with its tools eqn, refer, pic or tbl), all using text #format!