Margin improvements in Q2 helped lift the plus-size retailer.Shares of Torrid Holdings (CURV 8.96%) climbed today after the plus-sized women's apparel brand posted better-than-expected results in its second-quarter earnings report.The stock finished up 9% on the news. Torrid impresses the marketLike other apparel retailers, Torrid is struggling with a challenging consumer environment, but the company scaled back on markdowns to lift profits in the quarter.Comparable sales were down 0.8%, though the company ...