Build Tools Cleanup

tools/only_in_release_mode.py

Index: tools/only_in_release_mode.py
diff --git a/tools/only_in_release_mode.py b/tools/only_in_release_mode.py
index 089d30c039c91245c1f18d42f832bc18610f14c1..20ade171885f8c985f5f3409e9157ffefc7f16f6 100644
--- a/tools/only_in_release_mode.py
+++ b/tools/only_in_release_mode.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+# 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.
 
@@ -29,7 +29,7 @@ def Main():
   outputs = sys.argv[1:separator_index]
   arguments = sys.argv[separator_index + 1:]
   arguments[0] = os.path.normpath(arguments[0])
-  mode = os.getenv('DART_BUILD_MODE', default='release')
+  mode = os.getenv('DART_BUILD_MODE', 'release')
   if mode != 'release':
     print >> sys.stderr, 'Not running %s in mode=%s' % (arguments, mode)
     for output in outputs: