Fix to writing correctly the serialised game to a named file.

tturocy · tturocy · commit 5295d31b42ad · 2025-03-20T11:53:25.000Z
diff --git a/src/pygambit/game.pxi b/src/pygambit/game.pxi
@@ -1108,7 +1108,7 @@ class Game:
             filepath_or_buffer.write(serialized_game)
         else:
             with open(filepath_or_buffer, "w") as f:
-                f.write(serialized_game)
+                f.write(serialized_game, serialized_game.decode())
 
     def to_efg(
         self,
