Check-webkit-style applies style checks to multi-line string in Python. This is incorrect, coding style checks should not be applied to multi-line strings.
Given that this error is actually in pylint, I don't think it will be worth engineering time to fix. We could build a parser before passing data into pylint to remove multi-line strings, but given that multi-line strings are pretty rare in our code (mostly in tests) and that we only output pylint errors when code is changed, I don't think the impact of this bug warrants a fix.