Consider the following revision: Original: “For that reason…

Consider the following revision: Original: “For that reason we use three successive stages in the development of a signature, each stage being a refinement of the former, and each stage being a better approximation of an object’s spectral properties.” Revised: “For that reason we use three successive stages in the development of a signature, each a refinement of the former, and each a better approximation of an object’s spectral properties.” Which editing strategy does this revision illustrate?