refactor Board.__str__()

pigeon_magnet_solver/board.py

@@ -46,12 +46,10 @@ class Board:
         ), "Invalid buttons!"
 
     def __str__(self) -> str:
-        result = "\n".join(self.rows)
-        result = result\
+        return "\n".join(self.rows) \
             .replace("0", "⚪️") \
             .replace("1", "🟢️") \
             .replace("x", "⚫️")
-        return result
 
     @property
     def columns(self) -> tuple[str, ...]: