code: def cdata(text):
      
      if not text:
          return text
  
      if is_cdata(text):
          text = strip_cdata(text)
  
      escaped = "{0}{1}{2}".format(CDATA_START, text, CDATA_END)
      return escaped
docs: Wraps the input `text` in a ``<![CDATA[ ]]>`` block.
  
      If the text contains CDATA sections already, they are stripped and replaced
      by the application of an outer-most CDATA block.
  
      Args:
          text: A string to wrap in a CDATA block.
  
      Returns:
          The `text` value wrapped in ``<![CDATA[]]>``