Fri, 18 Dec 2009 20:13:23 -0800 huffman generalize lemma add_minus_cancel, add lemma minus_add, simplify some proofs
Fri, 18 Dec 2009 19:00:11 -0800 huffman rename equals_zero_I to minus_unique (keep old name too)
Fri, 18 Dec 2009 18:48:27 -0800 huffman add lemma swap_triple
Sun, 20 Dec 2009 18:02:13 +0100 wenzelm improve performance by reordering of parser combinators;
Sun, 20 Dec 2009 17:47:59 +0100 wenzelm added nested comments;
Sun, 20 Dec 2009 15:44:29 +0100 wenzelm more Scala sources;
Sun, 20 Dec 2009 15:44:07 +0100 wenzelm simiplified result of keyword parser (again);
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