Fixed #28593 -- Added a simplified URL routing syntax per DEP 0201.

Thanks Aymeric Augustin for shepherding the DEP and patch review.
Thanks Marten Kenbeek and Tim Graham for contributing to the code.
Thanks Tom Christie, Shai Berger, and Tim Graham for the docs.

docs/topics/class-based-views/index.txt

@@ -38,11 +38,11 @@ URLconf. If you're only changing a few simple attributes on a class-based view,
 you can simply pass them into the
 :meth:`~django.views.generic.base.View.as_view` method call itself::
 
-    from django.conf.urls import url
+    from django.urls import path
     from django.views.generic import TemplateView
 
     urlpatterns = [
-        url(r'^about/$', TemplateView.as_view(template_name="about.html")),
+        path('about/', TemplateView.as_view(template_name="about.html")),
     ]
 
 Any arguments passed to :meth:`~django.views.generic.base.View.as_view` will
@@ -75,11 +75,11 @@ class method instead, which provides a function-like entry to class-based
 views::
 
     # urls.py
-    from django.conf.urls import url
+    from django.urls import path
     from some_app.views import AboutView
 
     urlpatterns = [
-        url(r'^about/$', AboutView.as_view()),
+        path('about/', AboutView.as_view()),
     ]
 
 
@@ -100,11 +100,11 @@ preferable to ask the API when the most recent book was published.
 
 We map the URL to book list view in the URLconf::
 
-    from django.conf.urls import url
+    from django.urls import path
     from books.views import BookListView
 
     urlpatterns = [
-        url(r'^books/$', BookListView.as_view()),
+        path('books/', BookListView.as_view()),
     ]
 
 And the view::