Wed, 28 Nov 2018 14:51:24 +0100 wenzelm clarified order;
Wed, 28 Nov 2018 14:40:06 +0100 wenzelm tuned whitespace;
Wed, 28 Nov 2018 14:05:03 +0100 wenzelm clarified symbol groups;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 tip