[Checkins] [zopefoundation/BTrees] 1b886c: Create coverage only for two sample builds.

[GitHub]

  Branch: refs/heads/coverage
  Home:   https://github.com/zopefoundation/BTrees
  Commit: 1b886c0191852e0a7b96d3c9aba17df17fbea46f
      https://github.com/zopefoundation/BTrees/commit/1b886c0191852e0a7b96d3c9aba17df17fbea46f
  Author: Michael Howitz <mh at gocept.com>
  Date:   2018-04-20 (Fri, 20 Apr 2018)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Create coverage only for two sample builds.

`tox.ini` also only runs coverage for one Python version.