Tue, 01 Jul 2014 16:47:10 +0200 added hidden check to Sledgehammer fact filters, to avoid picking up facts like 'Nat.nat_induct0'
blanchet [Tue, 01 Jul 2014 16:47:10 +0200] rev 57469
added hidden check to Sledgehammer fact filters, to avoid picking up facts like 'Nat.nat_induct0'
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