Key TakeawaysDollar General shares rose Thursday morning as the retailer reported fourth-quarter earnings that beat analyst estimates.Dollar General also said it plans to open about 800 new stores and remodel 1,500 existing locations over the next year.In October, Dollar General announced the return of CEO Todd Vasos less than a year after he retired following a seven-year run as the company's chief executive. Dollar General (DG) shares edged 0.8% higher in early trading Thursday after the release of fourth ...