Update Tic_Tac_Toe.mp

models/Application_examples/Tic_Tac_Toe.mp

@@ -185,9 +185,9 @@ DO
 OD;
 COORDINATE $third_move:
  (
-     	X_chooses_center                         |
+      X_chooses_center                         |
       X_chooses_any_corner                       |
-     	X_chooses_corner_opposite_previous_X
+      X_chooses_corner_opposite_previous_X
  )
 DO
 	ADD SAY("THIRD MOVE OF THE GAME.") PRECEDES $third_move;