code: function AssertionArguments(args) {
      if (args.length == 2) {
          this.comment = "";
          this.expected = args[0];
          this.actual = args[1];
      } else {
          this.comment = args[0] + "; ";
          this.expected = args[1];
          this.actual = args[2];
      }
  }
docs: Preprocess the arguments to allow for an optional comment.