Wed, 08 Jun 2011 22:16:21 +0200 wenzelm modernized structure ProofContext;
Thu, 09 Jun 2011 17:58:42 +0200 wenzelm even more robust \isaspacing;
Thu, 09 Jun 2011 17:51:49 +0200 wenzelm simplified Name.variant -- discontinued builtin fold_map;
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