Default to y(es) when asking user about archiving committed branches

git_cl.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 # Copyright (C) 2008 Evan Martin <martine@danga.com>
 
 """A git-command for integrating reviews on Rietveld and Gerrit."""
 
 from __future__ import print_function
@@ skipping 3187 matching lines @@
     print('%*s   %s' % (alignment, next_item[0], next_item[1]))
 
   if any(branch == current_branch for branch, _ in proposal):
     print('You are currently on a branch \'%s\' which is associated with a '
           'closed codereview issue, so archive cannot proceed. Please '
           'checkout another branch and run this command again.' %
           current_branch)
     return 1
 
   if not options.force:
-    if ask_for_data('\nProceed with deletion (Y/N)? ').lower() != 'y':
+    answer = ask_for_data('\nProceed with deletion (Y/n)? ').lower()
+    if answer not in ('y', ''):
       print('Aborted.')
       return 1
 
   for branch, tagname in proposal:
     RunGit(['tag', tagname, branch])
     RunGit(['branch', '-D', branch])
   print('\nJob\'s done!')
 
   return 0
 
@@ skipping 1810 matching lines @@
 if __name__ == '__main__':
   # These affect sys.stdout so do it outside of main() to simplify mocks in
   # unit testing.
   fix_encoding.fix_encoding()
   setup_color.init()
   try:
     sys.exit(main(sys.argv[1:]))
   except KeyboardInterrupt:
     sys.stderr.write('interrupted\n')
     sys.exit(1)