Wed, 18 Aug 2010 14:04:13 +0200 wenzelm tuned;
Wed, 18 Aug 2010 14:02:32 +0200 wenzelm refined notion of Text.Range;
Wed, 18 Aug 2010 11:25:09 +0200 wenzelm decode Isabelle symbol positions in one spot;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip