Wed, 26 Feb 2014 11:57:52 +0100 prefer proof context over background theory
haftmann [Wed, 26 Feb 2014 11:57:52 +0100] rev 55757
prefer proof context over background theory
Wed, 26 Feb 2014 10:10:38 +0100 made tactics more robust
traytel [Wed, 26 Feb 2014 10:10:38 +0100] rev 55756
made tactics more robust
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