message: Update rl_runner.py
  syntax typo from fsdb
diff: @@ -37,7 +37,7 @@ def loop(working_dir='estimator_working_dir'):
  while True:
  print("==================================")
  with timer("Train"):
  - train = subprocess.call(['python' 'rl_loop.py', 'train'] + flags)
  + train = subprocess.call(['python', 'rl_loop.py', 'train'] + flags)
  if train != 0:
  print("Skipping validation")
  continue
  