Chipotle is going through a transitional period, but its long-term potential remains strong.Chipotle (CMG -2.78%) has been one of my favorite fast-casual restaurants for quite some time now. It's also been an investor favorite during the past half-decade or so. It has far outperformed all three major indexes (S&P 500, Nasdaq Composite, and Dow Jones) and many top-class growth stocks during that span.Unfortunately for Chipotle investors, it's been a shaky ride since its 50-for-1 stock split in mid-June. The ...