Fix many* python scripts in src/

testing/generate_gmock_mutant.py

Index: testing/generate_gmock_mutant.py
diff --git a/testing/generate_gmock_mutant.py b/testing/generate_gmock_mutant.py
old mode 100644
new mode 100755
index 83fbb48aab9f55d44802fe19af234dc261c304e1..fb977d417cebcb15b10742c98f9fe7a8f962c8af
--- a/testing/generate_gmock_mutant.py
+++ b/testing/generate_gmock_mutant.py
@@ -1,9 +1,10 @@
-#!/usr/bin/python
-# Copyright (c) 2009 The Chromium Authors. All rights reserved.
+#!/usr/bin/env python
+# Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import string
+import sys
 
 HEADER = """\
 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
@@ -447,6 +448,8 @@ def main():
     for args in xrange(0, 6 + 1):
       GenerateCreateFunctor(prebound, args)
   print FOOTER
+  return 0
+
 
 if __name__ == "__main__":
-  main()
+  sys.exit(main())