 
     /// An enumeration representing the kNumberCaseType features.
     public enum NumberCase: FontFeatureProvider {
-        case upper, lower
+
+        case upper
+        case lower
+
         public func featureSettings() -> (type: Int, selector: Int) {
             switch self {
             case .upper:

                return (type: kNumberCaseType, selector: kLowerCaseNumbersSelector)
            }
        }
    }

    /// An enumeration representing the kNumberSpacingType features.
    public enum NumberSpacing: FontFeatureProvider {
        case monospaced, proportional
        public func featureSettings() -> (type: Int, selector: Int) {
            switch self {
            case .monospaced:

                return (type: kNumberSpacingType, selector: kProportionalNumbersSelector)
            }
        }

    }

    /// An enumeration representing the kVerticalPositionType features
    public enum VerticalPosition: FontFeatureProvider {

        case normal
        case superscript
        case `subscript`
        case ordinals
        case scientificInferiors

        public func featureSettings() -> (type: Int, selector: Int) {
            let selector: Int
            switch self {
