message: Add missing headers to normalizeWhitespace tests
diff: +/**
  + * Copyright (c) Facebook, Inc.
  + * All rights reserved.
  + *
  + * This source code is licensed under the license found in the
  + * LICENSE file in the root directory of this source tree.
  + */
  import { expect } from 'chai';
  import { describe, it } from 'mocha';
  