Todd Gamblin 7b8e5c8999 bugfix: don't use sys.stdout as a default arg value (#16541) ... After migrating to `travis-ci.com`, we saw I/O issues in our tests -- tests that relied on `capfd` and `capsys` were failing. We've also seen this in GitHub actions, and it's kept us from switching to them so far. Turns out that the issue is that using streams like `sys.stdout` as default arguments doesn't play well with `pytest` and output redirection, as `pytest` changes the values of `sys.stdout` and `sys.stderr`. if these values are evaluated before output redirection (as they are when used as default arg values), output won't be captured properly later. - [x] replace all stream default arg values with `None`, and only assign stream values inside functions. - [x] fix tests we didn't notice were relying on this erroneous behavior		2020-05-09 00:56:18 -07:00
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util	bugfix: don't use sys.stdout as a default arg value (#16541)	2020-05-09 00:56:18 -07:00
__init__.py	copyright: update copyright dates for 2020 (#14328)	2019-12-30 22:36:56 -08:00