Tue, 03 Sep 2013 19:58:00 +0200 wenzelm cases: formal binding of 'assumes', with position provided via invoke_case;
Tue, 03 Sep 2013 18:21:43 +0200 wenzelm minor tuning;
Tue, 03 Sep 2013 13:09:15 +0200 wenzelm cases: more position information and PIDE markup;
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