Handle KeyboardInterrupt consistently in python scripts

git_rebase_update.py

Index: git_rebase_update.py
diff --git a/git_rebase_update.py b/git_rebase_update.py
index a61e53a3ab5b5b94e482e0eef9e71fd82ad9f2c6..10c10d151ac41189f9dbe4c95b998388bf7041c7 100755
--- a/git_rebase_update.py
+++ b/git_rebase_update.py
@@ -187,7 +187,7 @@ def rebase_branch(branch, parent, start_hash):
   return True
 
 
-def main(args=()):
+def main(args=None):
   parser = argparse.ArgumentParser()
   parser.add_argument('--verbose', '-v', action='store_true')
   parser.add_argument('--no_fetch', '--no-fetch', '-n',
@@ -270,4 +270,8 @@ def main(args=()):
 
 
 if __name__ == '__main__':  # pragma: no cover
-  sys.exit(main(sys.argv[1:]))
+  try:
+    sys.exit(main())
+  except KeyboardInterrupt:
+    sys.stderr.write('interrupted\n')
+    sys.exit(1)