old_contents: from django.conf.urls import patterns, url
  
  urlpatterns = patterns(
      'mozillians.humans',
      url(r'^humans.txt$', 'views.humans', name='humans'),
      url(r'^contribute.json/$', 'views.contribute_view', name='contribute-view')
  )
  
new_contents: from django.conf.urls import patterns, url
  
  urlpatterns = patterns(
      'mozillians.humans',
      url(r'^humans.txt$', 'views.humans', name='humans'),
      url(r'^contribute.json$', 'views.contribute_view', name='contribute-view')
  )
  
subject: correct contribute.json URL