old_contents: """
  URLs for the Enrollment API
  
  """
  from django.conf import settings
  from django.conf.urls import patterns, url
  
  from .views import (
      EnrollmentView,
      EnrollmentListView,
      EnrollmentCourseDetailView
  )
  
  
  urlpatterns = patterns(
      'enrollment.views',
      url(
          r'^enrollment/{username},{course_key}$'.format(
              username=settings.USERNAME_PATTERN, course_key=settings.COURSE_ID_PATTERN
          ),
          EnrollmentView.as_view(),
          name='courseenrollment'
      ),
      url(
          r'^enrollment/{course_key}$'.format(course_key=settings.COURSE_ID_PATTERN),
          EnrollmentView.as_view(),
          name='courseenrollment'
      ),
      url(r'^enrollment$', EnrollmentListView.as_view(), name='courseenrollments'),
      url(
          r'^course/{course_key}$'.format(course_key=settings.COURSE_ID_PATTERN),
          EnrollmentCourseDetailView.as_view(),
          name='courseenrollmentdetails'
      ),
  )
  
new_contents: """
  URLs for the Enrollment API
  
  """
  from django.conf import settings
  from django.conf.urls import patterns, url
  
  from .views import (
      EnrollmentView,
      EnrollmentListView,
      EnrollmentCourseDetailView
  )
  
  
  urlpatterns = patterns(
      'enrollment.views',
      url(
          r'^enrollment/{username},{course_key}/$'.format(
              username=settings.USERNAME_PATTERN, course_key=settings.COURSE_ID_PATTERN
          ),
          EnrollmentView.as_view(),
          name='courseenrollment'
      ),
      url(
          r'^enrollment/{course_key}/$'.format(course_key=settings.COURSE_ID_PATTERN),
          EnrollmentView.as_view(),
          name='courseenrollment'
      ),
      url(r'^enrollment$', EnrollmentListView.as_view(), name='courseenrollments'),
      url(
          r'^course/{course_key}/$'.format(course_key=settings.COURSE_ID_PATTERN),
          EnrollmentCourseDetailView.as_view(),
          name='courseenrollmentdetails'
      ),
  )
  
subject: Add options trailing slashes to the Enrollment API.