[Checkins] [zopefoundation/zope.exceptions] bfa427: Add a flake8 job to Travis CI

[Marius Gedminas]

  Branch: refs/heads/flake8
  Home:   https://github.com/zopefoundation/zope.exceptions
  Commit: bfa427e05da8e4505c32aefbae311775aca76db0
      https://github.com/zopefoundation/zope.exceptions/commit/bfa427e05da8e4505c32aefbae311775aca76db0
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2020-04-10 (Fri, 10 Apr 2020)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Add a flake8 job to Travis CI