code: def quote_xml(text):
      
      text = _coerce_unicode(text)
  
      # If it's a CDATA block, return the text as is.
      if text.startswith(CDATA_START):
          return text
  
      # If it's not a CDATA block, escape the XML and return the character
      # encoded string.
      return saxutils.escape(text)
docs: Format a value for display as an XML text node.
  
      Returns:
          Unicode string (str on Python 3, unicode on Python 2)