message: docs(handbook): handle no errors in validateList demo
diff: @@ -14,6 +14,9 @@ export default class ValidateListDemo extends Component {
  @computed('changeset.error.list.validation')
  get listResults() {
  + if (!this.changeset.error.list) {
  + return [];
  + }
  return transposeResults(
  this.changeset.error.list.validation as ValidatorResult[],
  );
  