Fri, 11 May 2018 17:27:30 +0200 wenzelm proper heading;
Fri, 11 May 2018 11:42:23 +0200 wenzelm removed unused Java FX modules (it will be unbundled from JDK eventually);
Thu, 10 May 2018 22:03:51 +0100 paulson tidied some messy proofs
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