Tue, 30 Sep 2008 22:02:50 +0200 wenzelm load_thy: Toplevel.excursion based on units of command/proof pairs;
Tue, 30 Sep 2008 22:02:47 +0200 wenzelm more command categories;
Tue, 30 Sep 2008 22:02:45 +0200 wenzelm renamed Future.fork_irrelevant to Future.fork_background;
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