[go_router_builder] Fix unnecessary whitespace in generated RelativeGoRouteData#9875

auto-submit[bot] merged 6 commits intoflutter:mainflutter/packages:mainfrom

LukasMirbt:go-router-builder/relative-route-generation-newlinesLukasMirbt/packages:go-router-builder/relative-route-generation-newlinesCopy head branch name to clipboard