Mon, 24 Sep 2018 14:58:15 +0200 wenzelm clarified message;
Mon, 24 Sep 2018 13:01:25 +0200 wenzelm tuned signature: more explicit types;
Mon, 24 Sep 2018 12:16:19 +0200 wenzelm clarified signature;
Mon, 24 Sep 2018 12:07:17 +0200 wenzelm eliminated dead code (see b806a7678083);
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