xunitfile: Test for multiline failure message.
xunitfile: Test for multiline failure message.

This test currently fails because we replace newlines with spaces when writing
XML attributes. Correct behavior would be escaping them with &#10;.

Senseg/robotframework,userzimmermann/robotframework-python3,Senseg/robotframework,Senseg/robotframework,Senseg/robotframework,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,Senseg/robotframework,userzimmermann/robotframework-python3