In the steady rhythm of a northern city's growth, Sault Ste. Marie has approved a new Shoppers Drug Mart at the busy corner of Trunk Road and South Market Street — a $3.25-million commitment that speaks less to a single building permit than to a retailer's quiet confidence in a community's future. Issued in August as part of a month that saw nearly $17 million in construction value approved, the project reflects the Trunk Road corridor's emergence as a focal point for commercial investment in Northern Ontario. Cities grow not in grand gestures but in accumulations of such decisions, each one a