code: def text(self, text):
          
          ret = u"".join(text.content)
          if 'url' in text.properties:
              return u"`%s`_" % ret
          if 'bold' in text.properties:
              return u"**%s**" % ret
          if 'italic' in text.properties:
              return u"*%s*" % ret
          if 'sub' in text.properties:
              return ur"\ :sub:`%s`\ " % ret
          if 'super' in text.properties:
              return ur"\ :sup:`%s`\ " % ret
          return ret
docs: process a pyth text and return the formatted string