Just refactor tests that require further investigation

compiler/testData/codegen/box/toArray/toTypedArray.kt

@@ -1,15 +1,14 @@
 // TODO: muted automatically, investigate should it be ran for JS or not
 // IGNORE_BACKEND: JS
+// missing isArrayOf on JS
 
 // WITH_RUNTIME
 
-import java.util.Arrays
-
 fun box(): String {
-    val array = Arrays.asList(2, 3, 9).toTypedArray()
-    if (!array.isArrayOf<Int>()) return array.javaClass.toString()
+    val array = listOf(2, 3, 9).toTypedArray()
+    if (!array.isArrayOf<Int>()) return "fail: is not Array<Int>"
 
-    val str = Arrays.toString(array)
+    val str = array.contentToString()
     if (str != "[2, 3, 9]") return str
 
     return "OK"