message: fix bench fmt
diff: @@ -878,7 +878,6 @@ mod bench {
  keygen_with_depth(Depth(7), b)
  }
  -
  #[bench]
  fn keygen_depth8(b: &mut test::Bencher) {
  keygen_with_depth(Depth(8), b)
  @@ -894,9 +893,7 @@ mod bench {
  fn sign_depth12(b: &mut test::Bencher) {
  let (sk, _) = keygen(Depth(12), &Seed::zero());
  let msg = [0u8; 256];
  - b.iter(|| {
  - sign(&sk, &msg)
  - })
  + b.iter(|| sign(&sk, &msg))
  }
  #[bench]
  @@ -904,9 +901,7 @@ mod bench {
  let (sk, pk) = keygen(Depth(12), &Seed::zero());
  let msg = [0u8; 256];
  let signature = sign(&sk, &msg);
  - b.iter(|| {
  - verify(&pk, &msg, &signature)
  - })
  + b.iter(|| verify(&pk, &msg, &signature))
  }
  #[bench]
  