Issue #3384679 by Gauravvvv, kostyashupenko, neclimdul, PickyOrder, mgifford:...

Issue #3384679 by Gauravvvv, kostyashupenko, neclimdul, PickyOrder, mgifford: aria-current is giving an invalid value

core/includes/theme.inc

@@ -9,7 +9,6 @@
  */
 
 use Drupal\Component\Render\FormattableMarkup;
-use Drupal\Core\StringTranslation\TranslatableMarkup;
 use Drupal\Core\Url;
 use Drupal\Component\Serialization\Json;
 use Drupal\Component\Utility\Crypt;
@@ -1837,7 +1836,7 @@ function template_preprocess_pager(&$variables) {
     $items['pages'][$i]['attributes'] = new Attribute();
     if ($i == $pager_current) {
       $variables['current'] = $i;
-      $items['pages'][$i]['attributes']->setAttribute('aria-current', new TranslatableMarkup('Current page'));
+      $items['pages'][$i]['attributes']->setAttribute('aria-current', 'page');
     }
   }
   // Add an ellipsis if there are further next pages.

core/modules/system/tests/src/Unit/Pager/PreprocessPagerTest.php

@@ -88,7 +88,7 @@ public function testQuantitySet() {
     /** @var \Drupal\Core\Template\AttributeString $attribute */
     $attribute = $variables['items']['pages']['2']['attributes']->offsetGet('aria-current');
     $this->assertInstanceOf(AttributeString::class, $attribute);
-    $this->assertEquals('Current page', $attribute->value());
+    $this->assertEquals('page', $attribute->value());
   }
 
 }