Roll Observatory deps (charted -> ^0.3.0)

packages/collection/lib/equality.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.
 
 /**
  * Defines equality relations on collections.
  */
 library dart.pkg.collection.equality;
 
 import "dart:collection";
@@ skipping 339 matching lines @@
  *
  * Recognizes lists, sets, iterables and maps and compares their elements using
  * deep equality as well.
  *
  * Non-iterable/map objects are compared using a configurable base equality.
  *
  * Works in one of two modes: ordered or unordered.
  *
  * In ordered mode, lists and iterables are required to have equal elements
  * in the same order. In unordered mode, the order of elements in iterables
- * and lists are not importan.
+ * and lists are not important.
  *
  * A list is only equal to another list, likewise for sets and maps. All other
  * iterables are compared as iterables only.
  */
 class DeepCollectionEquality implements Equality {
   final Equality _base;
   final bool _unordered;
   const DeepCollectionEquality([Equality base = const DefaultEquality()])
       : _base = base, _unordered = false;
 
@@ skipping 39 matching lines @@
       if (o is List) return new ListEquality(this).hash(o);
       if (o is Iterable) return new IterableEquality(this).hash(o);
     } else if (o is Iterable) {
       return new UnorderedIterableEquality(this).hash(o);
     }
     return _base.hash(o);
   }
 
   bool isValidKey(Object o) => o is Iterable || o is Map || _base.isValidKey(o);
 }