[Checkins] [zopefoundation/zope.exceptions] ea559c: Adapt tests to Python 3.9.

[Michael Howitz]

  Branch: refs/heads/py39
  Home:   https://github.com/zopefoundation/zope.exceptions
  Commit: ea559c1f3090b4763f2ca5622da2078bc5050a2d
      https://github.com/zopefoundation/zope.exceptions/commit/ea559c1f3090b4763f2ca5622da2078bc5050a2d
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-07-03 (Fri, 03 Jul 2020)

  Changed paths:
    M CHANGES.rst
    M setup.cfg
    M setup.py
    M src/zope/exceptions/log.py
    M src/zope/exceptions/tests/test_exceptionformatter.py
    M tox.ini

  Log Message:
  -----------
  Adapt tests to Python 3.9.

Drop support for Python 3.5 as its sunset is in some months.