Roll Observatory deps (charted -> ^0.3.0)

packages/collection/lib/wrappers.dart

 // Copyright (c) 2013, 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.
 
 /**
  * Delegating wrappers for [Iterable], [List], [Set], [Queue] and [Map].
  *
  * Also adds unmodifiable views for `Set` and `Map`, and a fixed length
- * view for `List`. The unmodifable list view from `dart:collection` is exported
- * as well, just for completeness.
+ * view for `List`. The unmodifiable list view from `dart:collection` is
+ * exported as well, just for completeness.
  */
 library dart.pkg.collection.wrappers;
 
 import "dart:collection";
 import "dart:math" show Random;
 
 import "src/unmodifiable_wrappers.dart";
 
 export "src/canonicalized_map.dart";
 export "src/unmodifiable_wrappers.dart";
@@ skipping 540 matching lines @@
    * Returns a new set which contains all the elements of [this] and [other].
    *
    * That is, the returned set contains all the elements of this [Set] and all
    * the elements of [other].
    *
    * Note that the returned set will use the default equality operation, which
    * may be different than the equality operation [this] uses.
    */
   Set<V> union(Set<V> other) => toSet()..addAll(other);
 }