carrot.worker.listener: Fixed typos in docstrings.
carrot.worker.listener: Fixed typos in docstrings.

WoLpH/celery,cbrepo/celery,ask/celery,WoLpH/celery,mitsuhiko/celery,ask/celery,mitsuhiko/celery,cbrepo/celery,frac/celery,frac/celery