It's not just Chipotle, it's the restaurant industry.Shares of burrito king Chipotle Mexican Grill (CMG 3.64%) dropped 13% in July according to data provided by S&P Global Market Intelligence. It comes on the heels of a highly watched stock split followed by negative reports about the state of the restaurant industry.What's happening at ChipotleChipotle is known for its healthy and fresh ingredients at its more than 3,500 fast-casual restaurants. It has developed a loyal fan base of affluent customers who a ...