Mon, 29 Mar 2010 18:44:24 +0200 blanchet make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
Mon, 29 Mar 2010 15:50:18 +0200 blanchet get rid of Polyhash, since it's no longer used
Mon, 29 Mar 2010 15:26:19 +0200 blanchet remove use of Polyhash;
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