Fri, 23 Jun 2017 16:16:41 +0200 wenzelm indent = 0 for blank lines: produce less whitespace by default;
Fri, 23 Jun 2017 15:46:25 +0200 wenzelm clarified prev_line: stop at blank line;
Fri, 23 Jun 2017 14:59:00 +0200 wenzelm more information;
Fri, 23 Jun 2017 14:38:32 +0200 wenzelm tuned signature;
Fri, 23 Jun 2017 14:24:48 +0200 wenzelm tuned;
Fri, 23 Jun 2017 14:21:16 +0200 wenzelm avoid trailing spaces;
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