Don't output "pytest.fail()" lines

[Deleted user]

When tests fail, I get to see things like:

pytest.fail("Test {0!r} failed with {1} errors!".format(os.path.basename(xmltestcase), nr_errors))

This is ugly and somewhat blocks the view... Can we get rid of this?

[Vogtinator]

Probably with pytest.fail(msg="Message", pytrace=False)

[Deleted user]

Is that a good idea? Or are we hiding overly valuable data from our tests there?

[Vogtinator]

Implemented in feature/stuff