Andreas Finkler

### Steps to reproduce See https://github.com/PyCQA/pylint/issues/5337. The test I added is analoguous to the existing test for ``contextlib.ExitStack``: ```python # this test works fine def test_suppress_in_exit_stack(): """Regression test for issue...

``bad-string-format-type``: only works on old-style string formatting and can't infer values

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### Bug description Two issues with ``bad-string-format-type``: 1. Just like ``bad-format-character`` the ``bad-string-format-type`` message is currently only raised for old-style string formatting. 2. If only a single value needs to...

As Travis CI no longer supports open source repositories as generously as previously, the CI/CD pipeline shall be migrated to Github Actions.