Thu, 09 Mar 2017 15:20:45 +0100 wenzelm clarified;
Thu, 09 Mar 2017 15:19:24 +0100 wenzelm incremental document changes;
Thu, 09 Mar 2017 15:08:44 +0100 wenzelm proper treatment of line that becomes empty;
Thu, 09 Mar 2017 14:05:34 +0100 wenzelm tuned;
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