ISABELLE_VERSION
Fri, 09 Dec 2022 12:37:26 +0100 follow Isabelle repository;
Tue, 15 Nov 2022 13:52:25 +0100 update to Isabelle2022 release;
Thu, 16 Sep 2021 11:47:03 +0200 follow Isabelle repository;
Sun, 18 Apr 2021 16:11:38 +0200 disentangle Isabelle repository "isab" vs. ISAC repository "isa":