old_contents: """test_project URL Configuration
  
  The `urlpatterns` list routes URLs to views. For more information please see:
      https://docs.djangoproject.com/en/1.10/topics/http/urls/
  Examples:
  Function views
      1. Add an import:  from my_app import views
      2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
  Class-based views
      1. Add an import:  from other_app.views import Home
      2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
  Including another URLconf
      1. Import the include() function: from django.conf.urls import url, include
      2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
  """
  from django.conf import settings
  from django.conf.urls import include, url
  from django.contrib import admin
  
  from core.views import completion_demo
  
  
  urlpatterns = [
      url(r'^admin/', admin.site.urls),
      url(r'^$', completion_demo),
  ]
  
  if settings.DEBUG and settings.DJDT:
      import debug_toolbar
      urlpatterns = [
          url(r'^__debug__/', include(debug_toolbar.urls)),
      ] + urlpatterns
  
new_contents: """test_project URL Configuration
  
  The `urlpatterns` list routes URLs to views. For more information please see:
      https://docs.djangoproject.com/en/1.10/topics/http/urls/
  Examples:
  Function views
      1. Add an import:  from my_app import views
      2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
  Class-based views
      1. Add an import:  from other_app.views import Home
      2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
  Including another URLconf
      1. Import the include() function: from django.conf.urls import url, include
      2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
  """
  from django.conf import settings
  from django.conf.urls import include
  from django.contrib import admin
  
  try:
      from django.urls import re_path  # Django >= 4.0
  except ImportError:
      try:
          from django.conf.urls import re_path  # Django < 4.0
      except ImportError:  # Django < 2.0
          from django.conf.urls import url as re_path
  
  
  from core.views import completion_demo
  
  
  urlpatterns = [
      re_path(r'^admin/', admin.site.urls),
      re_path(r'^$', completion_demo),
  ]
  
  if settings.DEBUG and settings.DJDT:
      import debug_toolbar
      urlpatterns = [
          re_path(r'^__debug__/', include(debug_toolbar.urls)),
      ] + urlpatterns
  
subject: fix tests for Django 4.0