Fri, 29 Mar 2019 16:53:46 +0100 wenzelm tuned signature -- more operations;
Fri, 29 Mar 2019 13:48:10 +0100 wenzelm tuned signature;
Fri, 29 Mar 2019 13:42:17 +0100 wenzelm clarified 'file_prefix';
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 tip