Fixed #28947 -- Fixed crash when coercing a translatable URL pattern to str.

Regression in df41b5a05d.

tests/urlpatterns/test_resolvers.py

@@ -0,0 +1,15 @@
+from django.test import SimpleTestCase
+from django.urls.resolvers import RegexPattern, RoutePattern
+from django.utils.translation import gettext_lazy as _
+
+
+class RegexPatternTests(SimpleTestCase):
+
+    def test_str(self):
+        self.assertEqual(str(RegexPattern(_('^translated/$'))), '^translated/$')
+
+
+class RoutePatternTests(SimpleTestCase):
+
+    def test_str(self):
+        self.assertEqual(str(RoutePattern(_('translated/'))), 'translated/')