Would it be better to buy shares of the fast-casual Mexican food chain before the split or after?Chipotle Mexican Grill (CMG 0.42%) is one of the most recognized restaurant chains in the world. Its relentless focus on food quality and top-notch customer service has helped it build one of the most loyal followings among fast-food businesses.With sizzling carne asada, tasty burritos, and fresh avocado, it's hard not to enjoy a meal at Chipotle. However, the company has something new brewing, and it has nothin ...