cleanup to tools/testing/dart

tools/testing/dart/lib/status_expression.dart

 // Copyright (c) 2011, 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 status_expression;
 
 /**
  * Parse and evaluate expressions in a .status file for Dart and V8.
  * There are set expressions and Boolean expressions in a .status file.
  * The grammar is:
@@ skipping 310 matching lines @@
       }
       TermConstant right = new TermConstant(scanner.current);
       scanner.advance();
       return new Comparison(left, right, negate);
     } else {
       return new BooleanVariable(left);
     }
   }
 }