Collections.sort without comparator now uses natural order.

#KT-9771 Fixed

js/js.libraries/src/core/javautilCollections.kt

@@ -6,8 +6,10 @@ import java.util.*
 public object Collections {
     public fun max<T>(col: Collection<T>, comp: Comparator<in T>): T = java.util.max(col, comp)
 
-    public fun <T> sort(list: MutableList<T>): Unit = java.util.sort(list)
+    @Deprecated("Use list.sort() instead.", ReplaceWith("list.sort()"))
+    public fun <T: Comparable<T>> sort(list: MutableList<T>): Unit = java.util.sort(list, naturalOrder())
 
+    @Deprecated("Use list.sortWith(comparator) instead.", ReplaceWith("list.sortWith(comparator)"))
     public fun <T> sort(list: MutableList<T>, comparator: java.util.Comparator<in T>): Unit = java.util.sort(list, comparator)
 
     @Deprecated("Use list.reverse() instead.", ReplaceWith("list.reverse()"))
@@ -23,10 +25,7 @@ public object Collections {
 }
 
 @library("collectionsMax")
-internal fun max<T>(col: Collection<T>, comp: Comparator<in T>): T = noImpl
+private fun max<T>(col: Collection<T>, comp: Comparator<in T>): T = noImpl
 
 @library("collectionsSort")
-internal fun <T> sort(list: MutableList<T>): Unit = noImpl
+private fun <T> sort(list: MutableList<T>, comparator: Comparator<in T>): Unit = noImpl
-
-@library("collectionsSort")
-internal fun <T> sort(list: MutableList<T>, comparator: java.util.Comparator<in T>): Unit = noImpl

libraries/stdlib/test/collections/CollectionTest.kt

@@ -564,8 +564,9 @@ class CollectionTest {
     }
 
     @test fun sorted() {
-        assertEquals(listOf(1, 3, 7), listOf(3, 7, 1).sorted())
+        val data = listOf(11, 3, 7)
-        assertEquals(listOf(7, 3, 1), listOf(3, 7, 1).sortedDescending())
+        assertEquals(listOf(3, 7, 11), data.sorted())
+        assertEquals(listOf(11, 7, 3), data.sortedDescending())
     }
 
     @test fun sortedBy() {