message: Remove unnecessary normalization
diff: @@ -519,8 +519,7 @@ impl Div<BigUint> for BigDigit {
  type Output = BigUint;
  #[inline]
  - fn div(self, mut other: BigUint) -> BigUint {
  - other = other.normalize();
  + fn div(self, other: BigUint) -> BigUint {
  match other.data.len() {
  0 => panic!(),
  1 => From::from(self / other.data[0]),
  @@ -557,8 +556,7 @@ impl Rem<BigUint> for BigDigit {
  type Output = BigUint;
  #[inline]
  - fn rem(self, mut other: BigUint) -> BigUint {
  - other = other.normalize();
  + fn rem(self, other: BigUint) -> BigUint {
  match other.data.len() {
  0 => panic!(),
  1 => From::from(self % other.data[0]),
  