message: add comment about hiding commitments to 0
diff: @@ -496,7 +496,9 @@ where
  let expected_t_size = PERMUTS;
  let dummies = expected_t_size - t_comm.unshifted.len();
  - // Add some hiding commitments to 0
  + // Add `dummies` many hiding commitments to the 0 polynomial, since if the
  + // number of commitments in `t_comm` is less than the max size, it means that
  + // the higher degree coefficients of `t` are 0.
  for _ in 0..dummies {
  use ark_ec::ProjectiveCurve;
  let w = Fr::<G>::rand(rng);
  