Editorial: fix typo in textarea cloning steps

source

@@ -54851,7 +54851,7 @@ interface <dfn interface>HTMLTextAreaElement</dfn> : <span>HTMLElement</span> {
   <p>The <span data-x="concept-node-clone-ext">cloning steps</span> for <code>textarea</code>
   elements given <var>node</var>, <var>copy</var>, and <var>subtree</var> are to propagate the <span
   data-x="concept-textarea-raw-value">raw value</span> and <span data-x="concept-fe-dirty">dirty
-  value flag</span> from <var>node</var> to <var>node</var>.</p>
+  value flag</span> from <var>node</var> to <var>copy</var>.</p>
 
   <p>The <span>children changed steps</span> for <code>textarea</code> elements must, if the
   element's <span data-x="concept-fe-dirty">dirty value flag</span> is false, set the element's