matcher: fixed status file, formatting, tweaks to readme

lib/src/future_matchers.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.
 
 library matcher.future_matchers;
 
 import 'dart:async';
 
 import 'expect.dart';
 import 'interfaces.dart';
@@ skipping 28 matching lines @@
   final Matcher _matcher;
   final String _id;
 
   const _Completes(this._matcher, this._id);
 
   bool matches(item, Map matchState) {
     if (item is! Future) return false;
     var done = wrapAsync((fn) => fn(), _id);
 
     item.then((value) {
-      done(() { if (_matcher != null) expect(value, _matcher); });
+      done(() {
+        if (_matcher != null) expect(value, _matcher);
+      });
     }, onError: (error, trace) {
       var id = _id == '' ? '' : '${_id} ';
       var reason = 'Expected future ${id}to complete successfully, '
-                   'but it failed with ${error}';
+          'but it failed with ${error}';
       if (trace != null) {
         var stackTrace = trace.toString();
         stackTrace = '  ${stackTrace.replaceAll('\n', '\n  ')}';
         reason = '$reason\nStack trace:\n$stackTrace';
       }
       done(() => fail(reason));
     });
 
     return true;
   }
 
   Description describe(Description description) {
     if (_matcher == null) {
       description.add('completes successfully');
     } else {
       description.add('completes to a value that ').addDescriptionOf(_matcher);
     }
     return description;
   }
 }