As with most re-marriages between the same partners, the participants are not exactly starry-eyed. They have just figured out that the old deal was just better than no deal at all. The news that the obscurely named Joint Comprehensive Plan of Action (JCPOA) is back in force may reach you even before this article does, but the release of Nazanin Zaghari-Ratcliffe on Wednesday was a clear signal the Iran nuclear accord is back in effect. Ms Zaghari-Ratcliffe, an Iranian-born British citizen, was arrested in Tehran in 2016 while visiting her mother and jailed as a spy. She was actually being take…