To comply with looming rules that ban tech giants from favoring their own services, Google has been testing new look search results for flights, trains, hotels, restaurants, and products in Europe. The EU’s Digital Markets Act is supposed to help smaller companies get more traffic from Google, but reviews service Yelp says that when it tested Google’s design tweaks with consumers it had the opposite effect—making people less likely to click through to Yelp or another Google competitor.The result...