src: "Iorem ipsum dolor", n=0, dest: "_________________"; after call, dest: "_________________"; (res == dest): 1
src: "Iorem ipsum dolor", n=3, dest: "_________________"; after call, dest: "Ior______________"; (res == dest): 1
src: "Iorem ipsum dolor", n=17, dest: "_________________"; after call, dest: "Iorem ipsum dolor"; (res == dest): 1