code: def append_text(self, content):
          
          Core.append_text(self, content)
          known = self.resolver.top().resolved
          content.text = self.translated(content.text, known)
docs: Append text nodes into L{Content.data}
          Here is where the I{true} type is used to translate the value
          into the proper python type.
          @param content: The current content being unmarshalled.
          @type content: L{Content}