docs: def writeline(self, line=b'', sep=b'\n', echo=None):
          """
          Write a byte sequences to the channel and terminate it with carriage
          return and line feed.
  
          Args:
              line(bytes): The line to send.
              sep(bytes): The separator to use after each line.
              echo(bool): Whether to echo the written data to stdout.
  
          Raises:
              EOFError: If the channel was closed before all data was sent.
          """
  
          self.writelines([line], sep, echo)