      # Tracks each time a Field instance is created. Used to retain order.
      creation_counter = 0
  
      def __init__(self, required=True, widget=None, label=None, initial=None,
                   help_text=None, error_messages=None, show_hidden_initial=False,
                   validators=[], localize=False):
          # required -- Boolean that specifies whether the field is required.
          #             True by default.
          # widget -- A Widget class, or instance of a Widget class, that should
          #           be used for this Field when displaying it. Each Field has a
 
</s> remove         if label is not None:
            label = smart_text(label)
 </s> add  </s> remove                  initial=None, help_text=None, *args, **kwargs):
 </s> add                  initial=None, help_text='', *args, **kwargs): </s> remove                  help_text=None, to_field_name=None, *args, **kwargs):
 </s> add                  help_text='', to_field_name=None, *args, **kwargs): </s> remove         if help_text is None:
            self.help_text = ''
        else:
            self.help_text = smart_text(help_text)
 </s> add         self.help_text = help_text </s> remove                  initial=None, help_text=None, *args, **kwargs):
 </s> add                  initial=None, help_text='', *args, **kwargs):
                 help_text='', error_messages=None, show_hidden_initial=False,
      # Tracks each time a Field instance is created. Used to retain order.
      creation_counter = 0
  
      def __init__(self, required=True, widget=None, label=None, initial=None,
                 help_text='', error_messages=None, show_hidden_initial=False,
                   validators=[], localize=False):
          # required -- Boolean that specifies whether the field is required.
          #             True by default.
          # widget -- A Widget class, or instance of a Widget class, that should
          #           be used for this Field when displaying it. Each Field has a
keep keep keep keep replace keep keep keep keep keep
 Removed forced typecasting of help_text/label Field arguments

In any case, setting those variables to non-ascii utf-8 bytestrings
is now considered a programming error. 
django/forms/fields.py