[stdlib] Explicit visibility and return types: JS

Stepping test line number changes are due to changes in coroutineInternalJS.kt

libraries/stdlib/js/builtins/Enum.kt

@@ -7,15 +7,15 @@ package kotlin
 
 import kotlin.js.*
 
-abstract class Enum<E : Enum<E>>(@kotlin.internal.IntrinsicConstEvaluation val name: String, val ordinal: Int) : Comparable<E> {
+public abstract class Enum<E : Enum<E>>(@kotlin.internal.IntrinsicConstEvaluation public val name: String, public val ordinal: Int) : Comparable<E> {
 
-    final override fun compareTo(other: E) = ordinal.compareTo(other.ordinal)
+    final override fun compareTo(other: E): Int = ordinal.compareTo(other.ordinal)
 
-    final override fun equals(other: Any?) = this === other
+    final override fun equals(other: Any?): Boolean = this === other
 
     final override fun hashCode(): Int = identityHashCode(this)
 
-    override fun toString() = name
+    override fun toString(): String = name
 
-    companion object
+    public companion object
 }

libraries/stdlib/js/builtins/String.kt

@@ -12,7 +12,7 @@ package kotlin
  * implemented as instances of this class.
  */
 public class String : Comparable<String>, CharSequence {
-    companion object {}
+    public companion object {}
     
     /**
      * Returns a string obtained by concatenating this string with the string representation of the given [other] object.