First page of electron docs does not show code for all files in the given example

# Documentation style bug

The first page of the **electron** docs has a section titled **[Running examples with Electron Fiddle​](https://devdocs.io/electron/#running-examples-with-electron-fiddle)**. The documentation on the **[official site](https://www.electronjs.org/docs/latest/#running-examples-with-electron-fiddle)** for the same section has 3 files `main.js`, `preload.js` and `index.html`. However, devdocs shows the code for only `main.js`. There is no way to view the code for the other two files on devdocs.