Code style for com_wrapper

Note there is a minor code change in the controller. Where the display method default value for the ```$urlparams``` is changed from ```false``` to ```array()``` (as it should always be an array according to the doc block) and brings it into agreement with it's parent function https://github.com/joomla/joomla-cms/blob/staging/libraries/legacy/controller/legacy.php#L641 ; This has 0 b/c implications as the variable isn't actually used anywhere in the function anyhow.