only in patch2:
unchanged:
--- a/core/modules/link/tests/src/Unit/Plugin/Validation/Constraint/LinkNotExistingInternalConstraintValidatorTest.php
+++ b/core/modules/link/tests/src/Unit/Plugin/Validation/Constraint/LinkNotExistingInternalConstraintValidatorTest.php
@@ -59,7 +59,7 @@ public function providerValidate() {
 
     $data[] = [$url, TRUE];
 
-    // Not existing routed URL.
+    // Non-existent routed URL.
     $url = Url::fromRoute('example.not_existing_route');
 
     $url_generator = $this->createMock('Drupal\Core\Routing\UrlGeneratorInterface');