private static String normalizeMessage(String message) {
        return message.replace("\n", "\\n").replace("\r", "\\n");
    }
Creates a test case result from a list of model diff events.

<p>The diff events encountered are compared against the expected
validation events. An actual event (A) is considered a match with an
expected event (E) if A and E target the same shape, have the same
severity, the eventId of A contains the eventId of E, and the message
of E starts with the suppression reason or message of A.

@param actualEvents List of actual diff events.
@return Returns the created test case result.
smithy-diff/src/main/java/software/amazon/smithy/diff/testrunner/SmithyDiffTestCase.java