old_contents: from django.conf.urls import url
  
  from .views import CareerDetailView, CareerListView
  
  urlpatterns = [
      url(r'^$', CareerListView.as_view(), name='career_list'),
      url(r'^(?P<slug>[a-z-]+)/$', CareerDetailView.as_view(), name='career'),
  ]
  
new_contents: from django.conf.urls import url
  
  from .views import CareerDetailView, CareerListView
  
  urlpatterns = [
      url(r'^$', CareerListView.as_view(), name='career_list'),
      url(r'^(?P<slug>[^/]+)/$', CareerDetailView.as_view(), name='career'),
  ]
  
subject: Fix URLs