Start with default generated template

templates/content-edit/text-format-wrapper.html.twig

@@ -0,0 +1,26 @@
+{#
+/**
+ * @file
+ * Theme override for a text format-enabled form element.
+ *
+ * Available variables:
+ * - children: Text format element children.
+ * - description: Text format element description.
+ * - attributes: HTML attributes for the containing element.
+ * - aria_description: Flag for whether or not an ARIA description has been
+ *   added to the description container.
+ *
+ * @see template_preprocess_text_format_wrapper()
+ */
+#}
+<div class="js-text-format-wrapper text-format-wrapper js-form-item form-item">
+  {{ children }}
+  {% if description %}
+    {%
+      set classes = [
+        aria_description ? 'description',
+      ]
+    %}
+    <div{{ attributes.addClass(classes) }}>{{ description }}</div>
+  {% endif %}
+</div>