revert some changes to immutable test

Author: samzilverberg

compat/src/test/scala/test/scala/collection/QueueTest.scala

@@ -22,9 +22,9 @@ class QueueTest {
 
   @Test
   def testImmutableEnqueueAll: Unit = {
-    val q   = i.Queue(1, 2)
-    val lst = i.List(3, 4)
-    val eq  = q.enqueueAll(lst)
+    val q                   = i.Queue(1, 2)
+    val iter: Iterable[Int] = List(3, 4)
+    val eq                  = q.enqueueAll(iter)
     assertEquals(i.Queue(1, 2, 3, 4), eq)
   }