bpo-39058:  Preserve attribute order in argparse Namespace reprs. (GH-17621)

diff --git a/Lib/argparse.py b/Lib/argparse.py
index 9c710ce..2677ef6 100644
--- a/Lib/argparse.py
+++ b/Lib/argparse.py
@@ -129,7 +129,7 @@
         return '%s(%s)' % (type_name, ', '.join(arg_strings))
 
     def _get_kwargs(self):
-        return sorted(self.__dict__.items())
+        return list(self.__dict__.items())
 
     def _get_args(self):
         return []