diff --git a/flatland/envs/rail_env.py b/flatland/envs/rail_env.py
index 0e412d0cbe6feb5212d07cdc464c8ac9a62a5948..5dc9e8d6df20a7be22fdac7297f22619789575be 100644
--- a/flatland/envs/rail_env.py
+++ b/flatland/envs/rail_env.py
@@ -131,6 +131,7 @@ class RailEnv(Environment):
         max_episode_steps : int or None
 
         file_name: you can load a pickle file.
+
         """
 
         self.rail_generator: RailGenerator = rail_generator