Sat, 13 Mar 2021 15:39:48 +0100 wenzelm merged
Sat, 13 Mar 2021 15:14:46 +0100 wenzelm use SystemOnTPTP.list_systems from Isabelle/Scala, with dynamic URL option and more elementary error messages;
Sat, 13 Mar 2021 14:55:27 +0100 wenzelm clarified signature: let Sledgehammer handle SystemOnTPTP comments;
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