nit

dom.bs

@@ -5614,7 +5614,7 @@ these steps:
    <li><p>For each <var>inclusiveDescendant</var> in <var>node</var>'s
    <a>shadow-including inclusive descendants</a> that is <a for=Element>custom</a>,
    <a>enqueue a custom element callback reaction</a> with <var>inclusiveDescendant</var>, callback
-   name "<code>adoptedCallback</code>", and « <var>oldDocument</var>, <var>document</var>. »
+   name "<code>adoptedCallback</code>", and « <var>oldDocument</var>, <var>document</var> ».
    <!-- attributeChangedCallback is also old, then new -->
 
    <li><p>For each <var>inclusiveDescendant</var> in <var>node</var>'s