Wed, 14 Sep 2016 14:07:09 +0200 wenzelm more robust;
Wed, 14 Sep 2016 12:56:57 +0200 wenzelm maintain abbrevs in canonical reverse order;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -2 +2 +10 +30 +100 +300 +1000 +3000 +10000 tip