Fri, 21 May 1999 16:23:48 +0200 wenzelm added use_thy_only;
Fri, 21 May 1999 16:23:18 +0200 wenzelm added Interface/ROOT.ML Interface/isamode.ML Interface/proof_general.ML;
Fri, 21 May 1999 16:22:39 +0200 wenzelm avoid string constants;
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