The Mazda6 made its Canadian debut at the Canadian International Auto Show in Toronto and seems to have had its first major facelift since 2013.       A new grille was introduced to the Mazda6’s front, along with new-look headlights with LED accents. Some more exterior changes include the two pairs of 19-inch aluminum wheels, coated with high-gloss paint, and a “shark fin” antenna. A peek inside the 6 reveals Mazda’s first...