Remove empty spaces

Default Setting by my editor. Let me know I you want to keep them.

UI/Input/RadioButton.ts

@@ -11,7 +11,7 @@ export class RadioButton<T> extends InputElement<T> {
     private readonly value: UIEventSource<T>;
     private readonly _elements: InputElement<T>[]
     private readonly _selectFirstAsDefault: boolean;
-    
+
     constructor(elements: InputElement<T>[],
                 selectFirstAsDefault = true) {
         super(undefined);