New J2K: Fix existing test data

j2k/testData/fileOrElement/postProcessing/GetOperator.new.kt

@@ -8,7 +8,7 @@ internal class X {
 }
 
 internal class C {
-    fun foo(map: HashMap<String?, String?>): String? {
+    fun foo(map: HashMap<String, String>): String {
         return map["a"]
     }
 

j2k/testData/fileOrElement/postProcessing/RedundantTypeCast.new.kt

@@ -0,0 +1,7 @@
+internal class C {
+    fun foo(o: Any?) {
+        if (o is String) {
+            val l = o.length
+        }
+    }
+}