message: test(aio): the tutorial link no longer ends with a slash
  And since the navigation opens to the initial page, we don't need
  to click the link.
diff: @@ -10,10 +10,9 @@ describe('site App', function() {
  });
  it('should show features text after clicking "Features"', () => {
  - page.getLink('features').click().then(() => {
  + page.getLink('features').click();
  expect(page.getDocViewerText()).toMatch(/Progressive web apps/i);
  });
  - });
  it('should show the tutorial index page at `/tutorial/`', () => {
  // check that we can navigate directly to the tutorial page
  @@ -24,10 +23,7 @@ describe('site App', function() {
  page.getLink('features').click();
  // check that we can navigate to the tutorial page via a link in the navigation
  - const heading = page.getNavHeading(/tutorial/i);
  - expect(heading.getText()).toMatch(/tutorial/i);
  - heading.click();
  - page.getLink('tutorial/').click();
  + page.getLink('tutorial').click();
  expect(page.getDocViewerText()).toMatch(/Tutorial: Tour of Heroes/i);
  });
  