fails:Array#sort_by! sorts array in place by passing each element to the given block
fails:Array#sort_by! returns an Enumerator if not given a block
fails:Array#sort_by! completes when supplied a block that always returns the same result
fails:Array#sort_by! raises a RuntimeError on a frozen array
fails:Array#sort_by! raises a RuntimeError on an empty frozen array
fails:Array#sort_by! returns the specified value when it would break in the given block
fails:Array#sort_by! makes some modification even if finished sorting when it would break in the given block
