Andrey Skvortsov <andrej.skvortzov@gmail.com> [Mon, 14 Aug 2017 19:13:01 +0300] rev 1730
clean-up for PEP8: fix W291 trailing whitespace
Andrey Skvortsov <andrej.skvortzov@gmail.com> [Mon, 21 Aug 2017 20:17:19 +0000] rev 1729
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