[Checkins] [zopefoundation/z3c.autoinclude] 17d1d7: add black check

[Jens W. Klein]

  Branch: refs/heads/black
  Home:   https://github.com/zopefoundation/z3c.autoinclude
  Commit: 17d1d7bcf8d12402456af6f7e0f143b54397c52a
      https://github.com/zopefoundation/z3c.autoinclude/commit/17d1d7bcf8d12402456af6f7e0f143b54397c52a
  Author: Jens W. Klein <jk at kleinundpartner.at>
  Date:   2019-09-19 (Thu, 19 Sep 2019)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  add black check