Extract Function: In case of top-level and member declarations place extracted function after the original container

idea/testData/refactoring/extractFunction/parameters/extractThis/implicitThisInExtension.kt

@@ -1,6 +1,6 @@
 class Z(val a: Int)
 
-// NEXT_SIBLING:
+// SIBLING:
 fun Z.foo(): Int {
     return <selection>a</selection> + 1
 }