test(aio): fix e2e API test due to angular#20607 (angular#20661)

PR Close angular#20661

Author: petebacondarwin

aio/e2e/api.e2e-spec.ts

@@ -28,7 +28,7 @@ describe('Api pages', function() {
 
   it('should show readonly properties as getters', () => {
     const page = new ApiPage('api/common/http/HttpRequest');
-    expect(page.getOverview('class').getText()).toContain('get body: T|null');
+    expect(page.getOverview('class').getText()).toContain('get body: T | null');
   });
 
   it('should not show parenthesis for getters', () => {