Wed, 26 Feb 2014 17:12:07 +0100 wenzelm tuned specifications and proofs;
Wed, 26 Feb 2014 14:59:24 +0100 wenzelm more precise before_caret_range (looking both in space and time);
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -2 +2 +10 +30 +100 +300 +1000 +3000 +10000 tip