old_contents: from gym.envs.registration import register
  
  register(
      id='ctf-v0',
      entry_point='gym_ctf.envs:CtfEnv'
  )
  register(
      id='ctf-singleteam-v0',
      entry_points='gym_ctf.envs:CtfSingleTeamEnv'
  )
  
new_contents: from gym.envs.registration import register
  
  register(
      id='ctf-v0',
      entry_point='gym_ctf.envs:CtfEnv'
  )
  register(
      id='ctf-singleteam-v0',
      entry_point='gym_ctf.envs:CtfSingleTeamEnv'
  )
  
subject: Fix typo in __init__