message: Add a missing newline in the test.
diff: @@ -6,7 +6,6 @@ use std::sync::{Arc, Mutex};
  use std::thread;
  fn main() {
  -
  let data = Arc::new(Mutex::new(0));
  let mut threads = Vec::new();
  @@ -27,5 +26,4 @@ fn main() {
  let data = Arc::try_unwrap(data).unwrap().into_inner().unwrap();
  assert_eq!(data, 3);
  -
  }
  