old_contents: from django.conf.urls.defaults import patterns, url
  from shop_richcatalog.views import CatalogListView, CatalogDetailView
  
  urlpatters = patterns("",
          url(r"^$",
              CatalogListView.as_view(),
              name="catalog_list"),
          url(r"^(?P<slug>[0-9A-Za-z-_.//]+)/$",
              CatalogDetailView.as_view(),
              name="catalog_detail"))
  
new_contents: from django.conf.urls.defaults import patterns, url
  from shop_richcatalog.views import CatalogListView, CatalogDetailView
  
  urlpatterns = patterns("",
          url(r"^$",
              CatalogListView.as_view(),
              name="catalog_list"),
          url(r"^(?P<slug>[0-9A-Za-z-_.//]+)/$",
              CatalogDetailView.as_view(),
              name="catalog_detail"))
  
subject: Fix a typo in the urls file.