Fixed ReST error in docs/newforms.txt from [5218]

git-svn-id: http://code.djangoproject.com/svn/django/trunk@5219 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/newforms.txt

@@ -297,7 +297,7 @@ required. In this example, the data dictionary doesn't include a value for the
     {'nick_name': u'', 'first_name': u'John', 'last_name': u'Lennon'}
 
 In this above example, the ``clean_data`` value for ``nick_name`` is set to an
-empty string, because ``nick_name`` is ``CharField``, and ``CharField``s treat
+empty string, because ``nick_name`` is ``CharField``, and ``CharField``\s treat
 empty values as an empty string. Each field type knows what its "blank" value
 is -- e.g., for ``DateField``, it's ``None`` instead of the empty string.