Tue, 22 Dec 2015 15:39:01 +0100 haftmann stripped some legacy
Tue, 22 Dec 2015 15:38:59 +0100 haftmann tuned proofs and augmented some lemmas
Tue, 22 Dec 2015 17:41:46 +0100 wenzelm more standard nesting of sub-language: Parse.text allows atomic entities without quotes;
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