diff --git a/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php b/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
index 1ded194..38ef46c 100644
--- a/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
+++ b/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
@@ -7,7 +7,6 @@
 use Drupal\Core\Field\WidgetBase;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\link\LinkItemInterface;
-use Drupal\link\Plugin\Field\FieldType\LinkItem;
 use Symfony\Component\Validator\ConstraintViolation;
 use Symfony\Component\Validator\ConstraintViolationListInterface;
 
@@ -149,9 +148,11 @@ public static function validateUriElement($element, FormStateInterface $form_sta
             case LinkItemInterface::LINK_EXTERNAL:
               $error_message = 'External links must be a full URL and include its protocol, such as %link_example.';
               break;
+
             case LinkItemInterface::LINK_INTERNAL:
               $error_message = 'Use a title of a piece of content to select it, or enter an internal path starting with /, ? or #.';
               break;
+
             // Error message for LinkItemInterface::LINK_GENERIC.
             default:
               $error_message = 'Use a title of a piece of content to select it, or enter an internal path starting with /, ? or #. External links must be a full URL and include its protocol, such as %link_example.';
diff --git a/core/modules/link/tests/src/Functional/LinkFieldTest.php b/core/modules/link/tests/src/Functional/LinkFieldTest.php
index d5f388f..24ae724 100644
--- a/core/modules/link/tests/src/Functional/LinkFieldTest.php
+++ b/core/modules/link/tests/src/Functional/LinkFieldTest.php
@@ -139,7 +139,8 @@ public function testURLValidation() {
       'entity:user/999999' => 'entity:user/999999',
     ];
 
-    // Test external and internal URLs for 'link_type' = LinkItemInterface::LINK_GENERIC.
+    // Test external and internal URLs for
+    // 'link_type' = LinkItemInterface::LINK_GENERIC.
     $invalid_entries = $this->buildInvalidEntries(LinkItemInterface::LINK_GENERIC);
     $this->assertValidEntries($field_name, $valid_external_entries + $valid_internal_entries);
     $this->assertInvalidEntries($field_name, $invalid_entries['external'] + $invalid_entries['internal']);
@@ -171,7 +172,7 @@ public function testURLValidation() {
    * Builds an array of invalid link entries with their error messages.
    *
    * @param int $link_type
-   *   The link type identifier, such as LinkItemInterface::LINK_GENERIC,
+   *   The link type identifier, such as LinkItemInterface::LINK_GENERIC.
    *
    * @return array
    *   An associative array containing:
@@ -189,9 +190,11 @@ protected function buildInvalidEntries($link_type) {
       case LinkItemInterface::LINK_EXTERNAL:
         $validation_error_field = 'External links must be a full URL and include its protocol, such as @link_example.';
         break;
+
       case LinkItemInterface::LINK_INTERNAL:
         $validation_error_field = 'Use a title of a piece of content to select it, or enter an internal path starting with /, ? or #.';
         break;
+
       // Error message for LinkItemInterface::LINK_GENERIC.
       default:
         $validation_error_field = 'Use a title of a piece of content to select it, or enter an internal path starting with /, ? or #. External links must be a full URL and include its protocol, such as @link_example.';
@@ -199,9 +202,9 @@ protected function buildInvalidEntries($link_type) {
 
     $invalid_entries = [
       'external' => [
-        // Invalid protocol
+        // Invalid protocol.
         'invalid://not-a-valid-protocol' => $validation_error_1,
-        // Missing host name
+        // Missing host name.
         'http://' => $validation_error_1,
         // Missing protocol schema.
         'www.example.com' => $validation_error_field,
@@ -211,7 +214,7 @@ protected function buildInvalidEntries($link_type) {
         'entity:non_existing_entity_type/yar' => $validation_error_1,
         // URI for an entity that doesn't exist, with an invalid ID.
         'entity:user/invalid-parameter' => $validation_error_1,
-      ]
+      ],
     ];
 
     return $invalid_entries;