old_contents: try:
      from django.conf.urls import url
  except ImportError:
      from django.core.urlresolvers import reverse
  
  from masquerade.views import mask, unmask
  
  urlpatterns = [
      url(r'^mask/$', mask, name='masquerade-mask'),
      url(r'^unmask/$', unmask, name='masquerade-unmask'),
  ]
  
new_contents: try:
      from django.urls import url
  except ImportError:
      from django.core.urlresolvers import reverse
  
  from masquerade.views import mask, unmask
  
  urlpatterns = [
      url(r'^mask/$', mask, name='masquerade-mask'),
      url(r'^unmask/$', unmask, name='masquerade-unmask'),
  ]
  
subject: Fix a bad import path