Insert empty lines after functions and properties (KT-4002)

#KT-4002 Fixed

idea/testData/quickfix/createFromUsage/createFunction/invoke/afterInvokeOnUserType.kt

@@ -5,6 +5,7 @@ class A<T>(val n: T) {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }
+
 class B<T>(val m: T)
 
 fun test(): B<String> {

idea/testData/quickfix/createFromUsage/createFunction/invoke/afterInvokeOnUserTypeWithTypeParams.kt

@@ -5,6 +5,7 @@ class A<T>(val n: T) {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }
+
 class B<T>(val m: T)
 
 fun test<U, V>(u: U): B<V> {