Tue, 23 Dec 2014 16:12:54 -0800 Martin von Zweigbergk trydiff: simplify checking for additions
Tue, 23 Dec 2014 14:56:30 -0800 Martin von Zweigbergk trydiff: extract 'date2' variable like existing 'date1'
Tue, 23 Dec 2014 10:41:45 -0800 Martin von Zweigbergk trydiff: use sets, not lists, for containment checks
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