Fri, 08 May 2020 13:19:55 +0200 nipkow avoid hidden undef cases
Fri, 08 May 2020 06:26:29 +0000 haftmann explicit mask operation for bits
Fri, 08 May 2020 06:26:28 +0000 haftmann prefer _ mod 2 over of_bool (odd _)
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