Sat, 10 Nov 2007 23:03:57 +0100 wenzelm similar_types: uniform treatment of TFrees/TVars;
Sat, 10 Nov 2007 23:03:56 +0100 wenzelm notation: based on Syntax.update_const_gram (avoids duplicates);
Sat, 10 Nov 2007 23:03:52 +0100 wenzelm tuned specifications of 'notation';
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