Fix spelling in recent commit

build/util/lastchange.py

 #!/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.
 
 """
 lastchange.py -- Chromium revision fetching utility.
 """
 
 import re
@@ skipping 99 matching lines @@
 
   Returns:
     whether git-svn has been set up.
   """
   # To test whether git-svn has been set up, query the config for any
   # svn-related configuration.  This command exits with an error code
   # if there aren't any matches, so ignore its output.
   proc = RunGitCommand(directory, ['config', '--get-regexp', '^svn'])
   if proc:
     return (proc.wait() == 0)
-  return false
+  return False
 
 
 def FetchGitSVNURL(directory):
   """
   Fetch URL of SVN repository bound to git.
 
   Errors are swallowed.
 
   Returns:
     SVN URL.
@@ skipping 120 matching lines @@
     if out_file:
       WriteIfChanged(out_file, contents)
     else:
       sys.stdout.write(contents)
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())