[Checkins] [zopefoundation/Zope] bd17e8: Improve assert.

[Michael Howitz]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/Zope
  Commit: bd17e8fbab8a1b44a230de676dea1c2439487129
      https://github.com/zopefoundation/Zope/commit/bd17e8fbab8a1b44a230de676dea1c2439487129
  Author: Michael Howitz <mh at gocept.com>
  Date:   2019-02-09 (Sat, 09 Feb 2019)

  Changed paths:
    M src/ZPublisher/tests/test_WSGIPublisher.py

  Log Message:
  -----------
  Improve assert.