Sun, 07 Aug 2022 20:36:01 +0200 wenzelm afford default cache policy, despite 6a29709906c6;
Sun, 07 Aug 2022 13:44:01 +0200 wenzelm tuned signature;
Sun, 07 Aug 2022 12:58:59 +0200 wenzelm clarified signature: more uniform treatment of cache for Export.read_session vs. Export.read_theory;
Sun, 07 Aug 2022 12:37:57 +0200 wenzelm tuned;
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