message: docs: Add missing line in *zone-flags.ts* file for event-binding wiki.
  PR Close
diff: @@ -50,9 +50,11 @@ Angular also supports passive event listeners. For example, use the following st
  1. Create a file `zone-flags.ts` under `src` directory.
  2. Add the following line into this file.
  -3. In the `src/polyfills.ts` file, before importing zone.js, import the newly created `zone-flags`.
  -
  + ```typescript
  + (window as any)['__zone_symbol__PASSIVE_EVENTS'] = ['scroll'];
  ```
  +3. In the `src/polyfills.ts` file, before importing zone.js, import the newly created `zone-flags`.
  + ```typescript
  import './zone-flags';
  import 'zone.js'; // Included with Angular CLI.
  ```
  