Missing @param around single function argument on ES6 shorthand function

With parens around single argument:

``` js
/**
 * updateVPNStatus
 *
 * @param newStatus
 * @returns {undefined}
 */
const updateVPNStatus = (newStatus) => ...
```

Without:

``` js
/**
 * 
 *
 * @returns {undefined}
 */
const updateVPNStatus = newStatus => ...
```
