message: Opaque type ToString() does not wrap the result into the supplied
  left and right. Reformat.
diff: @@ -147,12 +147,11 @@ std::string DataTypeUtils::ToString(
  param_str.append(
  ToString(param_proto, (p == 0) ? empty : ",", empty));
  }
  - result.append("opaque(");
  + result.append(left).append("opaque(");
  result.append(op_type.has_domain() ? op_type.domain() : empty)
  .append(",");
  - result.append(op_type.has_name() ? op_type.name() : empty)
  - .append(",");
  - result.append("p(").append(param_str).append("))");
  + result.append(op_type.has_name() ? op_type.name() : empty).append(",");
  + result.append("p(").append(param_str).append("))").append(right);
  return result;
  }
  #endif
  