Sun, 24 Mar 2019 17:23:48 +0100 wenzelm tuned whitespace;
Sun, 24 Mar 2019 17:19:30 +0100 wenzelm clarified rendering: use COMMENT4 elsewhere;
Sun, 24 Mar 2019 13:48:46 +0100 wenzelm documentation of document markers and re-interpreted command tags;
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