Sat, 05 Jan 2013 19:05:16 +0100 wenzelm premature window close means failure;
Sat, 05 Jan 2013 18:42:29 +0100 wenzelm less aggressive Assumption.export_term (similar to Generic_Target.abbrev): merely expand local defs and thus allow notation for local fixes;
Sat, 05 Jan 2013 18:36:02 +0100 wenzelm proper return code on window close;
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