code: def render( self, tag, single, between, kwargs ):
          
  
          out = "<%s" % tag
          for key, value in list( kwargs.items( ) ):
              if value is not None:               # when value is None that means stuff like <... checked>
                  key = key.strip('_')            # strip this so class_ will mean class, etc.
                  if key == 'http_equiv':         # special cases, maybe change _ to - overall?
                      key = 'http-equiv'
                  elif key == 'accept_charset':
                      key = 'accept-charset'
                  out = "%s %s=\"%s\"" % ( out, key, escape( value ) )
              else:
                  out = "%s %s" % ( out, key )
          if between is not None:
              out = "%s>%s</%s>" % ( out, between, tag )
          else:
              if single:
                  out = "%s />" % out
              else:
                  out = "%s>" % out
          if self.parent is not None:
              self.parent.content.append( out )
          else:
              return out
docs: Append the actual tags to content.