Remove any unnecessary parens around expressions in interpolations.

pkg/analyzer/lib/src/generated/engine.dart

 // Copyright (c) 2014, 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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine;
 
 import 'dart:collection';
@@ skipping 9387 matching lines @@
   CompilationUnit get compilationUnit => _updatedUnit;
 
   /**
    * Return the source that is to be incrementally analyzed.
    *
    * @return the source
    */
   Source get source => cache != null ? cache.source : null;
 
   @override
-  String get taskDescription => "incremental analysis ${(cache != null ? cache.source : "null")}";
+  String get taskDescription => "incremental analysis ${cache != null ? cache.source : "null"}";
 
   @override
   void internalPerform() {
     if (cache == null) {
       return;
     }
     // Only handle small changes
     if (cache.oldLength > 0 || cache.newLength > 30) {
       return;
     }
@@ skipping 4053 matching lines @@
     _index++;
     if (_index >= _manager._workQueues[_queueIndex].length) {
       _index = 0;
       _queueIndex++;
       while (_queueIndex < _manager._workQueues.length && _manager._workQueues[_queueIndex].isEmpty) {
         _queueIndex++;
       }
     }
   }
 }