Typo in example code documentation

there is a typo in the example code in the documentation.
There is a space next to 'webrtc' string that keeps failing the if. This space is not in the demo code.

```javascript
if (App.options.context === 'webrtc ') {
                                   ^
```

should be 

```javascript
if (App.options.context === 'webrtc') {
```