Sun, 03 Jan 2021 16:21:59 +0100 wenzelm clarified HTML presentation elements;
Sun, 03 Jan 2021 12:11:56 +0100 wenzelm more robust bootstrap: Isabelle-jEdit.shasum could be absent;
Sat, 02 Jan 2021 23:03:47 +0100 wenzelm tuned whitespace (amending a4bffc0de967);
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