Tue, 02 Jun 2009 19:00:58 +0200 immler return unchanged node on errors
Tue, 02 Jun 2009 23:37:36 +0200 wenzelm handle_result: activate via explicit status "ready" (cf. http://isabelle.in.tum.de/repos/isabelle/rev/ce169bd37fc0);
Tue, 02 Jun 2009 22:31:58 +0200 wenzelm superficial tuning;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip