make_vec_env: Fix docstring

src/imitation/util/util.py

@@ -47,10 +47,10 @@ def make_vec_env(env_name: str,
       log_dir: If specified, saves Monitor output to this directory.
       max_episode_steps: If specified, wraps each env in a TimeLimit wrapper
           with this episode length. If not specified and `max_episode_steps`
-          exists for this VecEnv in the Gym registry, uses the registry value
-          for every TimeLimit wrapper (this is the default behavior when calling
-          `gym.make`). Otherwise the environments are passed into the VecEnv
-          unwrapped.
+          exists for this `env_name` in the Gym registry, uses the registry
+          `max_episode_steps` for every TimeLimit wrapper (this automatic
+          wrapper is the default behavior when calling `gym.make`). Otherwise
+          the environments are passed into the VecEnv unwrapped.
   """
   # Resolve the spec outside of the subprocess first, so that it is available to
   # subprocesses running `make_env` via automatic pickling.