proper comment: Phabricator remains on Ubuntu 20.04, which is still required as build environment for old Mercurial 3.9.2 with Python 2;
--- a/src/Pure/Tools/phabricator.scala Sat Sep 10 15:18:17 2022 +0200
+++ b/src/Pure/Tools/phabricator.scala Sat Sep 10 15:41:44 2022 +0200
@@ -1,7 +1,7 @@
/* Title: Pure/Tools/phabricator.scala
Author: Makarius
-Support for Phabricator server, notably for Ubuntu 18.04 LTS.
+Support for Phabricator server, notably for Ubuntu 20.04 LTS.
See also:
- https://www.phacility.com/phabricator