Format gym_unity using black

gym-unity/gym_unity/envs/unity_env.py

         uint8_visual=False,
         multiagent=False,
         flatten_branched=False,
-        no_graphics=False
+        no_graphics=False,
     ):
         """
         Environment initialization
         :param flatten_branched: If True, turn branched discrete action spaces into a Discrete space rather than MultiDiscrete.
         :param no_graphics: Whether to run the Unity simulator in no-graphics mode
         """
-        self._env = UnityEnvironment(environment_filename, worker_id, no_graphics=no_graphics)
+        self._env = UnityEnvironment(
+            environment_filename, worker_id, no_graphics=no_graphics
+        )
         self.name = self._env.academy_name
         self.visual_obs = None
         self._current_state = None