Renaming unittest parts- missed these when giving the libraries proper names.

pkg/unittest/lib/src/expect.dart

 // Copyright (c) 2012, 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.
 
-part of matcher;
+part of unittest.matcher;
 
 /** The objects thrown by the default failure handler. */
 class TestFailure extends Error {
   final String message;
 
   TestFailure(this.message);
 
   String toString() => message;
 }
 
@@ skipping 151 matching lines @@
  * formatter is returned; this allows custom expect handlers to easily
  * get a reference to the default formatter.
  */
 ErrorFormatter configureExpectFormatter([ErrorFormatter formatter = null]) {
   if (formatter == null) {
     formatter = _defaultErrorFormatter;
   }
   return _assertErrorFormatter = formatter;
 }