Sun, 29 Nov 2020 15:23:18 +0100 wenzelm clarified checks (see f34f5c057c9e);
Sun, 29 Nov 2020 14:57:15 +0100 wenzelm clarified signature;
Sun, 29 Nov 2020 14:27:15 +0100 wenzelm tuned comments;
Sun, 29 Nov 2020 13:59:18 +0100 wenzelm tuned;
Sun, 29 Nov 2020 07:57:50 +0000 haftmann typo
Sat, 28 Nov 2020 21:38:48 +0000 haftmann more on signed division
Sat, 28 Nov 2020 23:36:17 +0100 wenzelm clarified files;
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