President Nicolas Sarkozy said of his wife, Cécilia, in “Testimony,” his 2006 campaign book, “We cannot, nor do we know how to, distance ourselves from each other.” Such a thing, he declared, would be “impossible!” But the first lady of France seems to have done an excellent job of distancing herself from her husband since he assumed office last May, staying away from most official functions and staying out of public view for long periods. Now there are rumors that the 11-year Sarkozy marriage is about to end. “I have no comment, truly, truly, truly, I assure you,” the presidential...