diff -r 6f4627a65c0a Lib/argparse.py
--- a/Lib/argparse.py	Sun May 05 08:14:53 2013 +0200
+++ b/Lib/argparse.py	Sat May 11 06:17:46 2013 -0400
@@ -202,8 +202,6 @@
             if self.parent is not None:
                 self.formatter._indent()
             join = self.formatter._join_parts
-            for func, args in self.items:
-                func(*args)
             item_help = join([func(*args) for func, args in self.items])
             if self.parent is not None:
                 self.formatter._dedent()
diff -r 6f4627a65c0a Misc/ACKS
--- a/Misc/ACKS	Sun May 05 08:14:53 2013 +0200
+++ b/Misc/ACKS	Sat May 11 06:17:46 2013 -0400
@@ -208,6 +208,7 @@
 Brad Chapman
 Greg Chapman
 Mitch Chapman
+Yogesh Chaudhari
 David Chaum
 Nicolas Chauvat
 Jerry Chen
diff -r 6f4627a65c0a Misc/NEWS
--- a/Misc/NEWS	Sun May 05 08:14:53 2013 +0200
+++ b/Misc/NEWS	Sat May 11 06:17:46 2013 -0400
@@ -69,6 +69,8 @@
 Library
 -------
 
+- Issue #17940: Remove extra code in argparse.py
+
 - Issue #14173: Avoid crashing when reading a signal handler during
   interpreter shutdown.