Sun, 10 Mar 2019 21:31:28 +0100 wenzelm tuned -- Toplevel.presentation_context is total;
Sun, 10 Mar 2019 21:12:29 +0100 wenzelm document markers are formal comments, and may thus occur anywhere in the command-span;
Sun, 10 Mar 2019 15:31:24 +0100 wenzelm PIDE markup for spell-checking;
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