Fix formatting in some of test data files.

Adapted from https://github.com/develar/kotlin/commit/a9e0a42fb1347fa8e21c86b5a073ef8a7c873da0.

js/js.translator/testFiles/native/cases/classObject.kt

@@ -4,17 +4,17 @@ import js.*
 
 native
 class A(val c: Int) {
-  native
-  class object {
-    val g: Int = js.noImpl
-    val c: String = js.noImpl
-  }
+    native
+    class object {
+        val g: Int = js.noImpl
+        val c: String = js.noImpl
+    }
 }
 
 fun box(): Boolean {
-  if (A.g != 3) return false
-  if (A.c != "hoooray") return false
-  if (A(2).c != 2) return false
+    if (A.g != 3) return false
+    if (A.c != "hoooray") return false
+    if (A(2).c != 2) return false
 
-  return true
+    return true
 }