message: Fix clippy::if_same_then_else
diff: @@ -886,9 +886,7 @@ impl Signed for BigInt {
  fn powsign<T: Integer>(sign: Sign, other: &T) -> Sign {
  if other.is_zero() {
  Plus
  - } else if sign != Minus {
  - sign
  - } else if other.is_odd() {
  + } else if sign != Minus || other.is_odd() {
  sign
  } else {
  -sign
  