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

#KT-4002 Fixed

idea/testData/quickfix/createFromUsage/createFunction/iterator/afterCreateIteratorFromUsage1.kt

@@ -4,6 +4,7 @@ class Foo<T> {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }
+
 fun foo() {
     for (i: Int in Foo<Int>()) { }
 }

idea/testData/quickfix/createFromUsage/createFunction/iterator/afterCreateIteratorFromUsage2.kt

@@ -4,6 +4,7 @@ class Foo<T> {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }
+
 fun foo() {
     for (i in Foo<Int>()) {
         bar(i)