'New line of line block.'

def line_block(self, match, context, next_state):

    lineno = self.state_machine.abs_line_number()
    (line, messages, blank_finish) = self.line_block_line(match, lineno)
    self.parent += line
    self.parent.parent += messages
    self.blank_finish = blank_finish
    return ([], next_state, [])
