So an anodyne rom-com is for the most part what we get from this play, which opened on Wednesday night at the James Earl Jones Theater. Julianna Margulies stars as Delia, an anxious, bookish denizen of Greenwich Village, still grieving her husband’s death. Peter Gallagher plays the widowed Peter, the calm Californian psychoanalyst for whom Delia falls by email, so suddenly that it feels fated.