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;.

fiuba08/robotframework,ldtri0209/robotframework,fiuba08/robotframework,waldenner/robotframework,waldenner/robotframework,fiuba08/robotframework,ldtri0209/robotframework,fiuba08/robotframework,waldenner/robotframework,waldenner/robotframework,ldtri0209/robotframework,waldenner/robotframework,fiuba08/robotframework,ldtri0209/robotframework,ldtri0209/robotframework