[Checkins] [zopefoundation/ZConfig] 897bb0: support wrongful stderr polution

[GitHub]

  Branch: refs/heads/fd-silence-tests
  Home:   https://github.com/zopefoundation/ZConfig
  Commit: 897bb0920fbf083cda56ae547abcb95c94361621
      https://github.com/zopefoundation/ZConfig/commit/897bb0920fbf083cda56ae547abcb95c94361621
  Author: Fred Drake <fred.drake at keepertech.com>
  Date:   2018-12-26 (Wed, 26 Dec 2018)

  Changed paths:
    M ZConfig/tests/support.py
    M ZConfig/tests/test_schema2html.py
    M ZConfig/tests/test_validator.py

  Log Message:
  -----------
  support wrongful stderr polution

- suppress 'Unknown interpreted text role' output from some tests
- collect & validate cli error messages
- fixes issue #56



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