docs(aio): Upgrade examples to Angular 6 (#23234)

PR Close #23234

aio/content/examples/docs-style-guide/e2e/src/app.e2e-spec.ts

@@ -0,0 +1,15 @@
+'use strict'; // necessary for es6 output in node
+
+import { browser, element, by } from 'protractor';
+
+describe('Docs Style Guide', function () {
+  let _title = 'Authors Style Guide Sample';
+
+  beforeAll(function () {
+    browser.get('');
+  });
+
+  it('should display correct title: ' + _title, function () {
+    expect(element(by.css('h1')).getText()).toEqual(_title);
+  });
+});