Sat, 04 Sep 1999 21:08:38 +0200 wenzelm deactivated ProofContext.transfer_used_names;
Sat, 04 Sep 1999 21:07:12 +0200 wenzelm removed text vars;
Sat, 04 Sep 1999 21:06:20 +0200 wenzelm PureThy.have_thmss: "" replaces None;
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