message: Small fix for older Rust versions
diff: @@ -74,7 +74,7 @@ macro_rules! signed_impl {
  signed_impl!(isize i8 i16 i32 i64);
  -impl<T: Signed> Signed for Wrapping<T> where Wrapping<T>: Num + Neg<Output=Self>
  +impl<T: Signed> Signed for Wrapping<T> where Wrapping<T>: Num + Neg<Output=Wrapping<T>>
  {
  #[inline]
  fn abs(&self) -> Self {
  