Merged revisions 83675 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r83675 | r.david.murray | 2010-08-03 13:56:09 -0400 (Tue, 03 Aug 2010) | 12 lines

  #9444: use first of prefix_chars for help opt instead of raising error

  An argparse option parser created with a prefix_chars that did not
  include a '-' would happily add -h and --help options, and then throw
  an error when it tried to format the help because the - was an invalid
  prefix character.  This patch makes it use the first character of
  prefix_chars as the character for the help options if and only if '-'
  is not one of the valid prefix_chars.

  Fix by Theodore Turocy, unit tests by Catherine Devlin.
........
diff --git a/Misc/ACKS b/Misc/ACKS
index 15436f4..197a502 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -782,6 +782,7 @@
 Jason Trowbridge
 Anthony Tuininga
 Stephen Turner
+Theodore Turocy
 Bill Tutt
 Doobee R. Tzeck
 Eren Türkay