use pure_lines; fn main(){ let a = " hello world"; println!("=============="); println!("before:"); println!("{}",&a); println!("=============="); let s = pure_lines::pure_with(a,"> "); println!("after:"); println!("{}",s); println!("=============="); // Output: // ============== // before: // // hello // world // ============== // after: // > hello // > world // ============== }