Add some ArgumentError and RangeError constructors that capture more information.

tests/corelib/queue_test.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library queue.test;
 
 import "package:expect/expect.dart";
 import 'dart:collection';
 
 abstract class QueueTest {
@@ skipping 242 matching lines @@
     Queue queue = newQueue();
     Expect.isTrue(queue.isEmpty);
 
     for (int i = 0; i < N; i++) {
       queue.add(i);
       set.add(i);
     }
     Expect.equals(N, queue.length);
     Expect.isFalse(queue.isEmpty);
 
+    Expect.equals(0, queue.elementAt(0));
+    Expect.equals(N - 1, queue.elementAt(N - 1));
+    Expect.throws(() { queue.elementAt(-1); });
+    Expect.throws(() { queue.elementAt(N); });
+
     Iterable skip1 = queue.skip(1);
     Iterable take1 = queue.take(1);
     Iterable mapped = queue.map((e) => -e);
 
     for (int i = 0; i < 500; i++) {
       Expect.equals(i, take1.first);
       Expect.equals(i, queue.first);
       Expect.equals(-i, mapped.first);
       Expect.equals(i + 1, skip1.first);
       Expect.equals(i, queue.removeFirst());
@@ skipping 135 matching lines @@
     }
     Expect.equals(null, entry2);
   }
 }
 
 
 main() {
   new DoubleLinkedQueueTest().testMain();
   new ListQueueTest().testMain();
 }