Do not replace line breaks in code fixes

[Dreamescaper]

Example.

Code with diagnostic:

            Assert.AreEqual(expected, actual,
                "Some Test Message",
                "With format");

Code fix before PR:

            Assert.That(actual, Is.EqualTo(expected), "Some Test Message", "With format");

Code fix after PR:

            Assert.That(actual, Is.EqualTo(expected),
                "Some Test Message",
                "With format");

[mikkelbu]

Looks good. The only thing I was considering was whether we should have a proper guard that there are elements in newArguments in WithArguments - instead of just failing when calling First().

But examining the calling code this is the case now, so I think we should leave it as it is.

Thanks for the contribution 😄.