message: [gate][generic] fix cargo clippy
diff: @@ -189,8 +189,7 @@ impl<F: FftField + SquareRootField> ConstraintSystem<F> {
  }
  // multiplication
  - let mut mul =
  - &witness_cols_d4[register_offset + 0] * &witness_cols_d4[register_offset + 1];
  + let mut mul = &witness_cols_d4[register_offset] * &witness_cols_d4[register_offset + 1];
  let mul_selector_d8 = &self.coefficients8[coeff_offset + 3];
  mul.evals
  .par_iter_mut()
  @@ -246,12 +245,12 @@ impl<F: FftField + SquareRootField> ConstraintSystem<F> {
  let alpha_generic = alpha_pow * generic_zeta;
  // addition
  - res.push(alpha_generic * w_zeta[register_offset + 0]);
  + res.push(alpha_generic * w_zeta[register_offset]);
  res.push(alpha_generic * w_zeta[register_offset + 1]);
  res.push(alpha_generic * w_zeta[register_offset + 2]);
  // multplication
  - res.push(alpha_generic * w_zeta[register_offset + 0] * w_zeta[register_offset + 1]);
  + res.push(alpha_generic * w_zeta[register_offset] * w_zeta[register_offset + 1]);
  // constant
  res.push(alpha_generic);
  @@ -324,11 +323,11 @@ pub mod testing {
  ensure_eq!(self.typ, GateType::Generic, "generic: incorrect gate");
  let check_single = |coeffs_offset, register_offset| {
  - let sum = self.coeffs[coeffs_offset + 0] * this[register_offset + 0]
  + let sum = self.coeffs[coeffs_offset] * this[register_offset]
  + self.coeffs[coeffs_offset + 1] * this[register_offset + 1]
  + self.coeffs[coeffs_offset + 2] * this[register_offset + 2];
  let mul = self.coeffs[coeffs_offset + 3]
  - * this[register_offset + 0]
  + * this[register_offset]
  * this[register_offset + 1];
  ensure_eq!(
  zero,
  @@ -355,12 +354,12 @@ pub mod testing {
  let generic_gate = |coeff_offset, register_offset| {
  // addition (of left, right, output wires)
  - let mut ff = &coefficientsm[coeff_offset + 0] * &witness[register_offset + 0];
  + let mut ff = &coefficientsm[coeff_offset] * &witness[register_offset];
  ff += &(&coefficientsm[coeff_offset + 1] * &witness[register_offset + 1]);
  ff += &(&coefficientsm[coeff_offset + 2] * &witness[register_offset + 2]);
  // multiplication
  - ff += &(&(&witness[register_offset + 0] * &witness[register_offset + 1])
  + ff += &(&(&witness[register_offset] * &witness[register_offset + 1])
  * &coefficientsm[coeff_offset + 3]);
  // constant
  