Sun, 11 Jul 2021 21:00:41 +0200 wenzelm clarified Isabelle meta-info within jar;
Sun, 11 Jul 2021 20:47:55 +0200 wenzelm strict shasum: this is used on input files;
Sun, 11 Jul 2021 16:57:30 +0200 wenzelm clarified modules;
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