The Supreme Court has left town for the summer, and in doing so, has left the state of West Virginia waiting in suspense over the fate of a federal court ruling that would have required its legislature to come up with new, equal population districts for electing its three members of the U.S. House of Representatives this year.   But the Court has definitely put a stop, for this year’s elections, at least, to Arizona’s plan to require voters to prove they are U.S. citizens before they may register to take part in elections there.