Origins serialize to ASCII these days

dom.bs

@@ -4820,7 +4820,7 @@ The <dfn attribute for=Document><code>URL</code></dfn> attribute's getter and
 <a for=Document>URL</a>, <a lt="URL serializer" spec=url>serialized</a>.
 
 The <dfn attribute for=Document><code>origin</code></dfn> attribute's getter must return the
-<a lt="Unicode serialization of an origin">Unicode serialization</a> of <a>context object</a>'s
+<a lt="serialization of an origin">serialization</a> of <a>context object</a>'s
 <a for=Document>origin</a>.
 
 The <dfn attribute for=Document><code>compatMode</code></dfn> attribute's getter must