input: Write a python function to draw the tic-tac-toe board.
  assert draw_board([['X', 'O', 'X'], ['O', 'X', 'O'], ['X', 'O', 'X']])==None
  assert draw_board([[' ', ' ', ' '], [' ', ' ', ' '], [' ', ' ', ' ']])==None
  assert draw_board([['X', ' ', ' '], [' ', 'O', ' '], [' ', ' ', 'X']])==None
output: def draw_board(board):
      for row in board:
          print('|'.join(row))
          print('-' * 5)