Sun, 20 Oct 2019 20:38:22 +0200 clarified expand_proof/expand_name: allow more detailed control via thm_header;
wenzelm [Sun, 20 Oct 2019 20:38:22 +0200] rev 70915
clarified expand_proof/expand_name: allow more detailed control via thm_header; export_standard_proofs: authentic theorem names in "print" format;
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