Mon, 21 Dec 2020 12:51:28 +0100 provide zipperposition-2.0 for experimentation;
wenzelm [Mon, 21 Dec 2020 12:51:28 +0100] rev 72969
provide zipperposition-2.0 for experimentation;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 tip