[Checkins] [zopefoundation/BTrees] 15bcee: Make `check-manifest` happy.

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/BTrees
  Commit: 15bceebe1e8bcd0da518adf5429c75f5f3babf44
      https://github.com/zopefoundation/BTrees/commit/15bceebe1e8bcd0da518adf5429c75f5f3babf44
  Author: Michael Howitz <mh at gocept.com>
  Date:   2018-04-20 (Fri, 20 Apr 2018)

  Changed paths:
    M setup.cfg

  Log Message:
  -----------
  Make `check-manifest` happy.