docs: def strip_prompt(self, a_string):
          """ Strip 'Done' from command output """
          output = super(NetscalerSSH, self).strip_prompt(a_string)
          lines = output.split(self.RESPONSE_RETURN)
          if "Done" in lines[-1]:
              return self.RESPONSE_RETURN.join(lines[:-1])
          else:
              return output