Sat, 28 Jul 2018 16:49:53 +0200 wenzelm more robust: potentially a workaround for spurious HOL build problems seen by Larry Paulson;
Sat, 28 Jul 2018 16:30:58 +0200 wenzelm tuned;
Sat, 28 Jul 2018 16:08:04 +0200 wenzelm eliminated non-monotomnic Lazy.is_pending: Result may return to Expr due to Interrupt;
Sat, 28 Jul 2018 15:09:37 +0200 wenzelm unused;
Fri, 27 Jul 2018 23:04:27 +0200 wenzelm removed junk;
Fri, 27 Jul 2018 22:23:37 +0200 wenzelm clarified documentation;
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