old_contents: from django.conf.urls import patterns, url
  from . import views
  
  urlpatterns = patterns('',
  		url(r'^$', views.index, name='index'),
  		url(r'^link_form.html$', views.CreateLink.as_view(), name='link_form'))
  
new_contents: from django.conf.urls import patterns, url
  from . import views
  
  urlpatterns = patterns('',
  		url(r'^$', views.index, name='index'),
  		url(r'^link_form.html$', views.CreateLink.as_view(), name='link_form'),
  		)
  
subject: add trailing comma