Thu, 10 Jul 2008 17:26:25 +0200 wenzelm added Isar.undo, which emulates old-style undo on global tty state;
Thu, 10 Jul 2008 17:26:23 +0200 wenzelm provide old-style undo operation (still unused);
Thu, 10 Jul 2008 17:26:22 +0200 wenzelm added prompt markup;
Thu, 10 Jul 2008 13:37:35 +0200 wenzelm @{lemma}: allow terminal method;
Thu, 10 Jul 2008 13:37:34 +0200 wenzelm @{lemma}: allow terminal method, close derivation unless (open) mode is given;
Thu, 10 Jul 2008 13:37:33 +0200 wenzelm added is_diag;
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