Move into nested docroot

web/core/themes/classy/templates/misc/help-section.html.twig

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+{#
+/**
+ * @file
+ * Theme override for a section of the help page.
+ *
+ * This implementation divides the links into 4 columns.
+ *
+ * Available variables:
+ * - title: The section title.
+ * - description: The description text for the section.
+ * - links: Links to display in the section.
+ * - empty: Text to display if there are no links.
+ */
+#}
+<div class="clearfix">
+  <h2>{{ title }}</h2>
+  <p>{{ description }}</p>
+  {% if links %}
+    {# Calculate the column length, to divide links into 4 columns. #}
+    {% set size = links|length // 4 %}
+    {% if size * 4 < links|length %}
+      {% set size = size + 1 %}
+    {% endif %}
+
+    {# Output the links in 4 columns. #}
+    {% set count = 0 %}
+    {% for link in links %}
+      {% if count == 0 %}
+        {# Start a new column. #}
+        <div class="layout-column layout-column--quarter"><ul>
+      {% endif %}
+      <li>{{ link }}</li>
+      {% set count = count + 1 %}
+      {% if count >= size %}
+        {# End the current column. #}
+        {% set count = 0 %}
+        </ul></div>
+      {% endif %}
+    {% endfor %}
+
+    {# End the last column, if one is open. #}
+    {% if count > 0 %}
+      </ul></div>
+    {% endif %}
+  {% else %}
+    <p>{{ empty }}</p>
+  {% endif %}
+</div>

web/core/themes/classy/templates/misc/progress-bar.html.twig

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+{#
+/**
+ * @file
+ * Theme override for a progress bar.
+ *
+ * Note that the core Batch API uses this only for non-JavaScript batch jobs.
+ *
+ * Available variables:
+ * - label: The label of the working task.
+ * - percent: The percentage of the progress.
+ * - message: A string containing information to be displayed.
+ */
+#}
+{{ attach_library('classy/progress') }}
+<div class="progress" data-drupal-progress>
+  {% if label %}
+    <div class="progress__label">{{ label }}</div>
+  {% endif %}
+  <div class="progress__track"><div class="progress__bar" style="width: {{ percent }}%"></div></div>
+  <div class="progress__percentage">{{ percent }}%</div>
+  <div class="progress__description">{{ message }}</div>
+</div>

web/core/themes/classy/templates/misc/rdf-metadata.html.twig

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+{#
+/**
+ * @file
+ * Theme override for empty spans with RDF attributes.
+ *
+ * The XHTML+RDFa doctype allows either <span></span> or <span /> syntax to
+ * be used, but for maximum browser compatibility, W3C recommends the
+ * former when serving pages using the text/html media type, see
+ * http://www.w3.org/TR/xhtml1/#C_3.
+ *
+ * Available variables:
+ * - metadata: Each item within corresponds to its own set of attributes,
+ *   and therefore, needs its own 'attributes' element.
+ *
+ * @see template_preprocess_rdf_metadata()
+ */
+#}
+{% for attributes in metadata %}
+  <span{{ attributes.addClass('rdf-meta', 'hidden') }}></span>
+{% endfor %}

web/core/themes/classy/templates/misc/status-messages.html.twig

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+{#
+/**
+ * @file
+ * Theme override for status messages.
+ *
+ * Displays status, error, and warning messages, grouped by type.
+ *
+ * An invisible heading identifies the messages for assistive technology.
+ * Sighted users see a colored box. See http://www.w3.org/TR/WCAG-TECHS/H69.html
+ * for info.
+ *
+ * Add an ARIA label to the contentinfo area so that assistive technology
+ * user agents will better describe this landmark.
+ *
+ * Available variables:
+ * - message_list: List of messages to be displayed, grouped by type.
+ * - status_headings: List of all status types.
+ * - display: (optional) May have a value of 'status' or 'error' when only
+ *   displaying messages of that specific type.
+ * - attributes: HTML attributes for the element, including:
+ *   - class: HTML classes.
+ */
+#}
+{{ attach_library('classy/messages') }}
+{% block messages %}
+{% for type, messages in message_list %}
+  {%
+    set classes = [
+      'messages',
+      'messages--' ~ type,
+    ]
+  %}
+  <div role="contentinfo" aria-label="{{ status_headings[type] }}"{{ attributes.addClass(classes)|without('role', 'aria-label') }}>
+    {% if type == 'error' %}
+      <div role="alert">
+    {% endif %}
+      {% if status_headings[type] %}
+        <h2 class="visually-hidden">{{ status_headings[type] }}</h2>
+      {% endif %}
+      {% if messages|length > 1 %}
+        <ul class="messages__list">
+          {% for message in messages %}
+            <li class="messages__item">{{ message }}</li>
+          {% endfor %}
+        </ul>
+      {% else %}
+        {{ messages|first }}
+      {% endif %}
+    {% if type == 'error' %}
+      </div>
+    {% endif %}
+  </div>
+  {# Remove type specific classes. #}
+  {% set attributes = attributes.removeClass(classes) %}
+{% endfor %}
+{% endblock messages %}