message: test: fix typo in TestScheduler-spec.ts
  Fix a typo in a test description
diff: @@ -156,7 +156,7 @@ describe('TestScheduler', () => {
  });
  describe('createHotObservable()', () => {
  - it('should create a cold observable', () => {
  + it('should create a hot observable', () => {
  const expected = ['A', 'B'];
  const scheduler = new TestScheduler(null);
  const source = scheduler.createHotObservable('--a---b--|', { a: 'A', b: 'B' });
  