Value-oriented retailer Dollar General (DG 1.26%) has been through a rough patch since the COVID-19 pandemic began abating. After overestimating post-pandemic demand and clogging up stores with too much of the wrong inventory headed into 2023, the company has been booking heavy markdowns on tepid sales.Investors have shared in this struggle, too. From their late-2022 peak to last year's trough, Dollar General shares fell nearly 60%.There's a light at the end of the tunnel though. While overall sales still f ...