Sun, 13 Mar 2011 20:56:00 +0100 wenzelm files are identified via SHA1 digests -- discontinued ISABELLE_FILE_IDENT;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip