Mon, 29 Sep 1997 11:32:25 +0200 paulson qed_spec_mp, normalize_thm, etc. copied in from HOL.ML
Mon, 29 Sep 1997 11:31:56 +0200 paulson Step_tac -> Safe_tac
Mon, 29 Sep 1997 11:31:13 +0200 paulson Safe_tac, Safe_step_tac, and minor corrections including \tt -> \texttt
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