Thu, 30 Aug 2012 21:50:49 +0200 wenzelm register proofs of Isar goals, to enable recovery from unstable command states after interactive cancellation;
Thu, 30 Aug 2012 21:23:04 +0200 wenzelm refined treatment of forked proofs at transaction boundaries, including proof commands (see also 7ee000ce5390);
Thu, 30 Aug 2012 19:18:49 +0200 wenzelm some support for registering forked proofs within Proof.state, using its bottom context;
Thu, 30 Aug 2012 16:39:50 +0200 wenzelm tuned signature;
Thu, 30 Aug 2012 15:26:37 +0200 wenzelm refined status of forked goals;
Thu, 30 Aug 2012 15:22:21 +0200 wenzelm proper merge of promises to avoid exponential blow-up in pathologic situations (e.g. lack of PThm wrapping);
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