Fri, 01 Apr 2016 17:14:27 +0200 wenzelm removed redundant Position.set_range -- already done in Position.range;
Fri, 01 Apr 2016 17:13:40 +0200 wenzelm lower threshold -- command timing for proofs is cumulative, e.g. HOL 672 ~> 8889;
Fri, 01 Apr 2016 17:00:18 +0200 wenzelm less bulky timing information, e.g. HOL 56913 ~> 672;
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