ReSeparateMethodBodyAndHeaderRule has some false positives

[jecisc]

I have this method:

lightBackgroundColor
	^ Color r: 16r30 g: 16r3b b: 16r4f range: 16rff

And it produces a critic from ReSeparateMethodBodyAndHeaderRule but I have no comment.

We should fix this and add a regression test

@AngelHely I think this can be something nice to do next week