Replace 'class object' with 'default object' in builtins

core/builtins/native/kotlin/Enum.kt

@@ -22,7 +22,7 @@ package kotlin
  * information on enum classes.
  */
 public abstract class Enum<E : Enum<E>>(name: String, ordinal: Int): Comparable<E> {
-    class object {}
+    default object {}
 
     /**
      * Returns the name of this enum constant, exactly as declared in its enum declaration.

core/builtins/native/kotlin/Numbers.kt

@@ -23,7 +23,7 @@ package kotlin
  * On the JVM, non-nullable values of this type are represented as values of the primitive type `byte`.
  */
 public class Byte private () : Number, Comparable<Byte> {
-    class object {}
+    default object {}
 
     public override fun compareTo(other: Byte): Int
     public fun compareTo(other: Char): Int
@@ -100,7 +100,7 @@ public class Byte private () : Number, Comparable<Byte> {
  * On the JVM, non-nullable values of this type are represented as values of the primitive type `short`.
  */
 public class Short private () : Number, Comparable<Short> {
-    class object {}
+    default object {}
 
     public fun compareTo(other: Byte): Int
     public fun compareTo(other: Char): Int
@@ -177,7 +177,7 @@ public class Short private () : Number, Comparable<Short> {
  * On the JVM, non-nullable values of this type are represented as values of the primitive type `int`.
  */
 public class Int private () : Number, Comparable<Int> {
-    class object {}
+    default object {}
 
     public fun compareTo(other: Byte): Int
     public fun compareTo(other: Char): Int
@@ -262,7 +262,7 @@ public class Int private () : Number, Comparable<Int> {
  * On the JVM, non-nullable values of this type are represented as values of the primitive type `long`.
  */
 public class Long private () : Number, Comparable<Long> {
-    class object {}
+    default object {}
 
     public fun compareTo(other: Byte): Int
     public fun compareTo(other: Char): Int
@@ -347,7 +347,7 @@ public class Long private () : Number, Comparable<Long> {
  * On the JVM, non-nullable values of this type are represented as values of the primitive type `float`.
  */
 public class Float private () : Number, Comparable<Float> {
-    class object : FloatingPointConstants<Float> {}
+    default object : FloatingPointConstants<Float> {}
 
     public fun compareTo(other: Byte): Int
     public fun compareTo(other: Char): Int
@@ -424,7 +424,7 @@ public class Float private () : Number, Comparable<Float> {
  * On the JVM, non-nullable values of this type are represented as values of the primitive type `double`.
  */
 public class Double private () : Number, Comparable<Double> {
-    class object : FloatingPointConstants<Double> {}
+    default object : FloatingPointConstants<Double> {}
 
     public fun compareTo(other: Byte): Int
     public fun compareTo(other: Char): Int

core/builtins/native/kotlin/String.kt

@@ -21,7 +21,7 @@ package kotlin
  * implemented as instances of this class.
  */
 public class String : Comparable<String>, CharSequence {
-    class object {}
+    default object {}
     
     /**
      * Returns a string obtained by concatenating this string with the string representation of the given [other] object.