Fix SF #658023, "What's New in 2.3", s12, verbatim error

Remove space between \end {verbatim}
diff --git a/Doc/whatsnew/whatsnew23.tex b/Doc/whatsnew/whatsnew23.tex
index e81b3ad..6ff6fb7 100644
--- a/Doc/whatsnew/whatsnew23.tex
+++ b/Doc/whatsnew/whatsnew23.tex
@@ -1339,7 +1339,7 @@
  '__setitem__', 'clear', 'get', 'has_key', 'items', 'iteritems',
  'iterkeys', 'itervalues', 'keylist', 'keys', 'pop', 'popitem',
  'setdefault', 'update', 'valuelist', 'values']
-\end {verbatim}
+\end{verbatim}
 
 (Contributed by Raymond Hettinger.)