Sat, 14 Nov 2009 17:49:29 +0100 wenzelm isabelle_document: more explicit error output, notably for drafts;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip