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.

tests/i18n/patterns/locale/nl/LC_MESSAGES/django.po

@@ -36,3 +36,7 @@ msgstr "^profiel/"
 #: urls/namespace.py:9 urls/wrong_namespace.py:10
 msgid "^register/$"
 msgstr "^registreren/$"
+
+#: urls/namespace.py:12
+msgid "register-as-path/"
+msgstr "registreren-als-pad/"

tests/i18n/patterns/tests.py

@@ -155,6 +155,8 @@ class URLTranslationTests(URLTestCaseBase):
             self.assertEqual(translate_url('/en/users/', 'nl'), '/nl/gebruikers/')
             # Namespaced URL
             self.assertEqual(translate_url('/en/account/register/', 'nl'), '/nl/profiel/registreren/')
+            # path() URL pattern
+            self.assertEqual(translate_url('/en/account/register-as-path/', 'nl'), '/nl/profiel/registreren-als-pad/')
             self.assertEqual(translation.get_language(), 'en')
 
         with translation.override('nl'):
@@ -169,9 +171,11 @@ class URLNamespaceTests(URLTestCaseBase):
     def test_account_register(self):
         with translation.override('en'):
             self.assertEqual(reverse('account:register'), '/en/account/register/')
+            self.assertEqual(reverse('account:register-as-path'), '/en/account/register-as-path/')
 
         with translation.override('nl'):
             self.assertEqual(reverse('account:register'), '/nl/profiel/registreren/')
+            self.assertEqual(reverse('account:register-as-path'), '/nl/profiel/registreren-als-pad/')
 
 
 class URLRedirectTests(URLTestCaseBase):
@@ -322,6 +326,18 @@ class URLResponseTests(URLTestCaseBase):
         self.assertEqual(response['content-language'], 'pt-br')
         self.assertEqual(response.context['LANGUAGE_CODE'], 'pt-br')
 
+    def test_en_path(self):
+        response = self.client.get('/en/account/register-as-path/')
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(response['content-language'], 'en')
+        self.assertEqual(response.context['LANGUAGE_CODE'], 'en')
+
+    def test_nl_path(self):
+        response = self.client.get('/nl/profiel/registreren-als-pad/')
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(response['content-language'], 'nl')
+        self.assertEqual(response.context['LANGUAGE_CODE'], 'nl')
+
 
 class URLRedirectWithScriptAliasTests(URLTestCaseBase):
     """

tests/i18n/patterns/urls/namespace.py

@@ -1,4 +1,5 @@
 from django.conf.urls import url
+from django.urls import path
 from django.utils.translation import gettext_lazy as _
 from django.views.generic import TemplateView
 
@@ -8,4 +9,5 @@ app_name = 'account'
 urlpatterns = [
     url(_(r'^register/$'), view, name='register'),
     url(_(r'^register-without-slash$'), view, name='register-without-slash'),
+    path(_('register-as-path/'), view, name='register-as-path'),
 ]