The consumer spending slump may finally be over for this struggling sliver of the retail market.The better part of 2024 has been particularly challenging for dollar store chains like Dollar General (DG -1.89%) and Dollar Tree (DLTR -1.04%), the latter of which also owns Family Dollar. Whereas higher-earning households have comfortably curbed costs by shopping at Walmart (WMT 0.39%) more often than they have in the past, Dollar Tree's and Dollar General's core customers don't have a comparable downgrade opti ...