old_contents: import string
  
  from django.conf import settings
  
  
  COUPON_TYPES = getattr(settings, 'COUPNS_COUPON_TYPES', (
          ('monetary', 'Money based coupon'),
          ('percentage', 'Percentage discount'),
          ('virtual_currency', 'Virtual currency'),
      ))
  
  CODE_LENGTH = getattr(settings, 'COUPNS_CODE_LENGTH', 15)
  
  CODE_CHARS = getattr(settings, 'COUPNS_CODE_CHARS', string.letters+string.digits)
  
  
new_contents: import string
  
  from django.conf import settings
  
  
  COUPON_TYPES = getattr(settings, 'COUPONS_COUPON_TYPES', (
          ('monetary', 'Money based coupon'),
          ('percentage', 'Percentage discount'),
          ('virtual_currency', 'Virtual currency'),
      ))
  
  CODE_LENGTH = getattr(settings, 'COUPNS_CODE_LENGTH', 15)
  
  CODE_CHARS = getattr(settings, 'COUPNS_CODE_CHARS', string.letters+string.digits)
  
  
subject: fix typo