Two and a half years ago, a man who eats tuna filed a class action lawsuit against Starkist, a tuna company. His allegation was that the company was deliberately under-filling each can by a few tenths of an ounce. That might not make a difference to one consumer making one tuna salad, but would add up over millions of cans. While Starkist doesn’t admit fault, the case has been settled. If you’re a resident of the United States and bought at least one five-ounce can of any of these tunas from Starkist between February 19, 2009 and October 31, 2014,...