pytest.raises should complain about unknown arguments

[nicoddemus]

The example below passes without any complaints:

import pytest
def test():
    with pytest.raises(ValueError, unknown='foo'):
        raise ValueError

It should raise a TypeError because of the unknown parameter.

Follow up of #258

[pytestbot]

GitMate.io thinks possibly related issues are #1411 (Pytest stops), #238 (Introduce "ids" argument to pytest.fixture), #176 (pytest.raises(AssertionError) fails with cython modules), #3280 (pytest uses deprecated convert argument in attr's attrib), and #1602 (pytest.print()).

[brianmaissy]

@nicoddemus @RonnyPfannschmidt should this be closed?

[RonnyPfannschmidt]

yes, thanks for triaging