old_contents: import os
  
  # Just to trick it into importing fir ReadTheDocs.
  if os.environ.get('READTHEDOCS', None) == 'True':
      import sys.modules['qb'] = sys.modules[__name__]
  
  from core import Executor, Future
  
  _main = Executor()
  submit = _main.submit
  submit_ext = _main.submit_ext
  map = _main.map
  
new_contents: import os
  
  # Just to trick it into importing fir ReadTheDocs.
  if os.environ.get('READTHEDOCS', None) == 'True':
      import sys
      sys.modules['qb'] = sys.modules[__name__]
  
  from core import Executor, Future
  
  _main = Executor()
  submit = _main.submit
  submit_ext = _main.submit_ext
  map = _main.map
  
subject: Fix syntax error