old_contents: from django.conf.urls import url
  from django.conf import settings
  import os.path
  from django.views.static import serve
  import zerver.views.registration
  import zerver.views.auth
  
  # These URLs are available only in the development environment
  
  use_prod_static = getattr(settings, 'PIPELINE_ENABLED', False)
  static_root = os.path.join(settings.DEPLOY_ROOT, 'prod-static/serve' if use_prod_static else 'static')
  
  urls = [
      url(r'^coverage/(?P<path>.*)$',
          serve, {'document_root':
                  os.path.join(settings.DEPLOY_ROOT, 'var/coverage'),
                  'show_indexes': True}),
      url(r'^docs/(?P<path>.*)$',
          serve, {'document_root':
                  os.path.join(settings.DEPLOY_ROOT, 'docs/_build/html')}),
      url(r'^static/(?P<path>.*)$', serve, {'document_root': static_root}),
      url(r'^devlogin/$', zerver.views.auth.login_page,
          {'template_name': 'zerver/dev_login.html'}, name='zerver.views.auth.login_page'),
  ]
  
  i18n_urls = [
      url(r'^confirmation_key/$', zerver.views.registration.confirmation_key),
  ]
  
  # These are used for voyager development. On a real voyager instance,
  # these files would be served by nginx.
  if settings.LOCAL_UPLOADS_DIR is not None:
      urls += [
          url(r'^user_avatars/(?P<path>.*)$', serve,
              {'document_root': os.path.join(settings.LOCAL_UPLOADS_DIR, "avatars")}),
      ]
  
new_contents: from django.conf.urls import url
  from django.conf import settings
  import os.path
  from django.views.static import serve
  import zerver.views.registration
  import zerver.views.auth
  
  # These URLs are available only in the development environment
  
  use_prod_static = getattr(settings, 'PIPELINE_ENABLED', False)
  static_root = os.path.join(settings.DEPLOY_ROOT, 'prod-static/serve' if use_prod_static else 'static')
  
  urls = [
      # Serve static assets via the Django server
      url(r'^static/(?P<path>.*)$', serve, {'document_root': static_root}),
  
      # Serve useful development environment resources (docs, coverage reports, etc.)
      url(r'^coverage/(?P<path>.*)$',
          serve, {'document_root':
                  os.path.join(settings.DEPLOY_ROOT, 'var/coverage'),
                  'show_indexes': True}),
      url(r'^docs/(?P<path>.*)$',
          serve, {'document_root':
                  os.path.join(settings.DEPLOY_ROOT, 'docs/_build/html')}),
  
      # The special no-password login endpoint for development
      url(r'^devlogin/$', zerver.views.auth.login_page,
          {'template_name': 'zerver/dev_login.html'}, name='zerver.views.auth.login_page'),
  ]
  
  i18n_urls = [
      url(r'^confirmation_key/$', zerver.views.registration.confirmation_key),
  ]
  
  # These are used for voyager development. On a real voyager instance,
  # these files would be served by nginx.
  if settings.LOCAL_UPLOADS_DIR is not None:
      urls += [
          url(r'^user_avatars/(?P<path>.*)$', serve,
              {'document_root': os.path.join(settings.LOCAL_UPLOADS_DIR, "avatars")}),
      ]
  
subject: Add comments documenting sections.