message: update to a cleaner way of writing match
diff: @@ -237,14 +237,11 @@ where
  .map_err(|e| e.to_string())?;
  // fill in the rest
  - verifier_index.srs = match srs {
  - Some(t) => t,
  - None => {
  + verifier_index.srs = srs.unwrap_or_else(|| {
  let mut srs = SRS::<G>::create(verifier_index.max_poly_size);
  srs.add_lagrange_basis(verifier_index.domain);
  Arc::new(srs)
  - }
  - };
  + });
  verifier_index.endo = endo;
  verifier_index.fq_sponge_params = fq_sponge_params;
  