A few naughty external scripts do 'raise getopt.error, "blah"', and

   now crash because two arguments are expected.  Add a default value
   to keep those scripts running.

Lib/getopt.py

@@ -39,7 +39,7 @@ import os
 class GetoptError(Exception):
     opt = ''
     msg = ''
-    def __init__(self, msg, opt):
+    def __init__(self, msg, opt=''):
         self.msg = msg
         self.opt = opt
         Exception.__init__(self, msg, opt)