1,13d0
< diff --git a/core/modules/big_pipe/src/Tests/BigPipePlaceholderTestCases.php b/core/modules/big_pipe/src/Tests/BigPipePlaceholderTestCases.php
< index 1cf10d4..49719ec 100644
< --- a/core/modules/big_pipe/src/Tests/BigPipePlaceholderTestCases.php
< +++ b/core/modules/big_pipe/src/Tests/BigPipePlaceholderTestCases.php
< @@ -110,7 +110,7 @@ public static function cases(ContainerInterface $container = NULL, AccountInterf
<            'command' => 'insert',
<            'method' => 'replaceWith',
<            'selector' => '[data-big-pipe-placeholder-id="callback=Drupal%5CCore%5CRender%5CElement%5CStatusMessages%3A%3ArenderMessages&args[0]&token=a8c34b5e"]',
< -          'data' => "\n" . '    <div role="contentinfo" aria-label="Status message" class="messages messages--status">' . "\n" . '                  <h2 class="visually-hidden">Status message</h2>' . "\n" . '                    Hello from BigPipe!' . "\n" . '            </div>' . "\n    \n",
< +          'data' => "\n" . '    <div role="contentinfo" aria-label="Status message" class="messages messages--status">' . "\n" . '                  <h2 class="visually-hidden">Status message</h2>' . "\n" . '                    Hello from BigPipe!' . "\n" . '            </div>' . "\n    ",
<            'settings' => NULL,
<          ],
<        ];
84,95d70
< diff --git a/core/themes/classy/templates/misc/status-messages.html.twig b/core/themes/classy/templates/misc/status-messages.html.twig
< index 683a111..bc8fd10 100644
< --- a/core/themes/classy/templates/misc/status-messages.html.twig
< +++ b/core/themes/classy/templates/misc/status-messages.html.twig
< @@ -51,6 +51,6 @@
<      {% endif %}
<    </div>
<    {# Remove type specific classes. #}
< -  {{ attributes.removeClass(classes) }}
< +  {% set attributes = attributes.removeClass(classes) %}
<  {% endfor %}
<  {% endblock messages %}