Changed empty layout "E" to "_".

overcooked_simulator/game_content/layouts/basic.layout

-EEEEEEEEEEE
-ECCUCTCLCCE
-ECEEEEEEECE
-ECEEEEEEECE
-EWEEEEEEEEE
-ECEEEEEEEEE
-EPEEEEEEEEE
-ECEEEEEEECE
-ECEEEEEEEXE
-ECCBBCCCCCE
-EEEEEEEEEEE
+___________
+_CCUCTCLCC_
+_C_______C_
+_C_______C_
+_W_________
+_C_________
+_P_________
+_C_______C_
+_C_______X_
+_CCBBCCCCC_
+___________

overcooked_simulator/overcooked_environment.py

@@ -74,7 +74,7 @@ class Environment:
             "T": lambda pos: Dispenser(pos, self.item_info["Tomato"]),
             "L": lambda pos: Dispenser(pos, self.item_info["Lettuce"]),
             "P": lambda pos: Dispenser(pos, self.item_info["Plate"]),
-            "E": None,
+            "_": None,
             "U": lambda pos: Stove(
                 pos,
                 self.item_info["Pot"].create_item(),