diff --git a/core/lib/Drupal/Component/Utility/Html.php b/core/lib/Drupal/Component/Utility/Html.php
index 91c1435..be45575 100644
--- a/core/lib/Drupal/Component/Utility/Html.php
+++ b/core/lib/Drupal/Component/Utility/Html.php
@@ -426,9 +426,10 @@ public static function escape($text) {
    * Therefore relative URLs that are not root-relative cannot be safely
    * transformed and should generally be avoided.
    *
-   * Necessary for HTML that is served outside of a website: RSS, e-mail …
+   * Necessary for HTML that is served outside of a website, for example, RSS
+   * and e-mail.
    *
-   * @param string $html.
+   * @param string $html
    *   The partial (X)HTML snippet to load. Invalid markup will be corrected on
    *   import.
    * @param string $scheme_and_host
diff --git a/core/lib/Drupal/Core/EventSubscriber/RssResponseRelativeUrlFilter.php b/core/lib/Drupal/Core/EventSubscriber/RssResponseRelativeUrlFilter.php
index fbdb3d2..9a50709 100644
--- a/core/lib/Drupal/Core/EventSubscriber/RssResponseRelativeUrlFilter.php
+++ b/core/lib/Drupal/Core/EventSubscriber/RssResponseRelativeUrlFilter.php
@@ -1,10 +1,5 @@
 <?php
 
-/**
- * @file
- * Contains \Drupal\Core\EventSubscriber\RssResponseLinkFilter.
- */
-
 namespace Drupal\Core\EventSubscriber;
 
 use Drupal\Component\Utility\Html;
@@ -39,7 +34,7 @@ public function onResponse(FilterResponseEvent $event) {
    *
    * Does not change any existing protocol-relative or absolute URLs.
    *
-   * @param string $rss_markup.
+   * @param string $rss_markup
    *   The RSS markup to update.
    * @param \Symfony\Component\HttpFoundation\Request $request
    *   The current request.
diff --git a/core/modules/node/src/Tests/NodeRSSContentTest.php b/core/modules/node/src/Tests/NodeRSSContentTest.php
index 3f0748e..d1ce240 100644
--- a/core/modules/node/src/Tests/NodeRSSContentTest.php
+++ b/core/modules/node/src/Tests/NodeRSSContentTest.php
@@ -65,7 +65,7 @@ function testNodeRSSContent() {
   /**
    * Tests relative, root-relative, protocol-relative and absolute URLs.
    */
-  function testUrlHandling() {
+  public function testUrlHandling() {
     // Only the plain_text text format is available by default, which escapes
     // all HTML.
     FilterFormat::create([
@@ -84,7 +84,7 @@ function testUrlHandling() {
         'format' => 'full_html',
       ],
     ]);
-    $protocol_relative_url= substr(file_create_url('public://protocol-relative'), strlen(\Drupal::request()->getScheme() . ':'));
+    $protocol_relative_url = substr(file_create_url('public://protocol-relative'), strlen(\Drupal::request()->getScheme() . ':'));
     $this->drupalCreateNode($defaults + [
       'body' => [
         'value' => '<p><a href="' . $protocol_relative_url . '">Protocol-relative URL</a></p>',