Change files tested in Travis by changing git diff from 2-dot to 3-dot (#6960).
Change files tested in Travis by changing git diff from 2-dot to 3-dot (#6960).


richardliaw/ray,stephanie-wang/ray,ray-project/ray,pcmoritz/ray-1,stephanie-wang/ray,robertnishihara/ray,stephanie-wang/ray,robertnishihara/ray,pcmoritz/ray-1,robertnishihara/ray,robertnishihara/ray,pcmoritz/ray-1,pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,robertnishihara/ray,richardliaw/ray,richardliaw/ray,ray-project/ray,robertnishihara/ray,stephanie-wang/ray,ray-project/ray,richardliaw/ray,richardliaw/ray,richardliaw/ray,robertnishihara/ray,richardliaw/ray,stephanie-wang/ray,ray-project/ray,richardliaw/ray,robertnishihara/ray,stephanie-wang/ray,ray-project/ray,pcmoritz/ray-1,ray-project/ray,robertnishihara/ray,stephanie-wang/ray,pcmoritz/ray-1,stephanie-wang/ray,stephanie-wang/ray,ray-project/ray,pcmoritz/ray-1