Mon, 02 Oct 2017 11:43:17 +0200 wenzelm option -S for "isabelle build";
Sun, 01 Oct 2017 20:50:26 +0200 wenzelm persistent storage of imported_sources;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -2 +2 +10 +30 +100 +300 +1000 +3000 +10000 tip