simply logic

Author: Jayson Chen

dom.bs

@@ -6090,7 +6090,8 @@ algorithm is passed <var ignore>node</var> and <var ignore>oldDocument</var>, as
         <ol>
          <li><p>Let <var>registry</var> be null.
 
-         <li><p>If <var>inclusiveDescendant</var>'s <a for=tree>parent</a> is null or
+         <li><p>If <var>inclusiveDescendant</var>'s <a for=Element>custom element registry</a>
+         is non-null or <var>inclusiveDescendant</var>'s <a for=tree>parent</a> is null or
          <var>inclusiveDescendant</var>'s <a for=tree>parent</a> is a {{DocumentFragment}} but not
          a {{ShadowRoot}}, then set <var>registry</var> to <var>document</var>'s
          <a for=Document>custom element registry</a>.