Fix URL routing for submissions debug page

apps/submissions/urls.py

@@ -3,7 +3,7 @@ from django.conf.urls import patterns, url
 urlpatterns = patterns(
     'submissions.views',
     url(
-        r'^submissions/(?P<student_id>[^/]+)/(?P<course_id>[^/]+)/(?P<item_id>[^/]+)$',
+        r'^(?P<student_id>[^/]+)/(?P<course_id>[^/]+)/(?P<item_id>[^/]+)$',
         'get_submissions_for_student_item'
     ),
 )

urls.py

@@ -7,6 +7,6 @@ admin.autodiscover()
 
 urlpatterns = patterns(
     '',
-    url(r'^submissions', include(submissions.urls)),
+    url(r'^submissions/', include(submissions.urls)),
     url(r'^admin/', include(admin.site.urls)),
-)
+)
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