Issue Description:

Some functions have 2 closure parameters, such as:

UIView.animateWithDuration(_:animations:completion:)

With Xcode's auto fill you end up with:

UIView.animateWithDuration(1.0, animations: { 
            
            }) { (success) in
                
        }

The completion parameter is auto completed as a trailing closure, but this makes less sense when following a previous closure parameter. For clarity I think that functions that have 2 closures should not treat the last closure as a trailing closure and should instead look like this:

UIView.animateWithDuration(1.0, animations: { 
            
            }, completion: { success in
                
        })