Following the lead of New York City and Brookline, health regulators in Boston last night took the first step toward banning artery-clogging trans fat from French fries, doughnuts, and other food sold in restaurants and corner stores. more stories like this The Boston Public Health Commission voted unanimously, after little discussion, to give preliminary approval to a ban that would take effect late this year if it receives another thumbs-up in the spring. Commission members were spurred to action by scientific evidence linking artificial trans fat to heart disease in humans and to diabetes and obesity in animal studies. Brookline...