Rename to gymnasium

tests/spaces/test_box.py

@@ -4,9 +4,9 @@ import warnings
 import numpy as np
 import pytest
 
-import gym.error
-from gym.spaces import Box
-from gym.spaces.box import get_inf
+import gymnasium.error
+from gymnasium.spaces import Box
+from gymnasium.spaces.box import get_inf
 
 
 @pytest.mark.parametrize(
@@ -310,7 +310,7 @@ def test_sample_mask():
     """Box cannot have a mask applied."""
     space = Box(0, 1)
     with pytest.raises(
-        gym.error.Error,
+        gymnasium.error.Error,
         match=re.escape("Box.sample cannot be provided a mask, actual value: "),
     ):
         space.sample(mask=np.array([0, 1, 0], dtype=np.int8))