Address nits

source

@@ -20588,14 +20588,16 @@ interface <dfn>HTMLHyperlinkElementUtils</dfn> {
 
    <dt><var>hyperlink</var> . <code subdfn data-x="dom-hyperlink-search">search</code></dt>
    <dd>
-    <p>Returns the hyperlink's URL's query.</p>
-    <p>Can be set, to change the URL's query.</p>
+    <p>Returns the hyperlink's URL's query (includes leading "<code data-x"">?</code>" if
+    non-empty).</p>
+    <p>Can be set, to change the URL's query (ignores leading "<code data-x"">?</code>").</p>
    </dd>
 
    <dt><var>hyperlink</var> . <code subdfn data-x="dom-hyperlink-hash">hash</code></dt>
    <dd>
-    <p>Returns the hyperlink's URL's fragment.</p>
-    <p>Can be set, to change the URL's fragment.</p>
+    <p>Returns the hyperlink's URL's fragment (includes leading "<code data-x"">#</code>" if
+    non-empty).</p>
+    <p>Can be set, to change the URL's fragment (ignores leading "<code data-x"">?</code>").</p>
    </dd>
   </dl>
 
@@ -20608,17 +20610,21 @@ interface <dfn>HTMLHyperlinkElementUtils</dfn> {
   data-noexport="" data-x="concept-hyperlink-url-set">set the url</dfn> algorithm, which sets this
   element's <span data-x="concept-hyperlink-url">url</span> to the <span>resulting parsed URL</span>
   of <span data-x="resolve a url">resolving</span> this element's <code
-  data-x="attr-hyperlink-href">href</code> content attribute value relative to element. If <span
-  data-x="resolve a url">resolving</span> was aborted with an error, set this element's <span
+  data-x="attr-hyperlink-href">href</code> content attribute value relative to this element. If
+  <span data-x="resolve a url">resolving</span> was aborted with an error, set this element's <span
   data-x="concept-hyperlink-url">url</span> to null.</p>
 
   <p>When elements implementing the <code>HTMLHyperlinkElementUtils</code> mixin are created, and
   whenever those elements have their <code data-x="attr-hyperlink-href">href</code> content
   attribute set, changed, or removed, the user agent must <span
   data-x="concept-hyperlink-url-set">set the url</span>.</p>
 
+  <p class="note">This is only observable for "<code data-x="">blob</code>" <span
+  data-x="url">URLs</span> as <span data-x="url parser">parsing</span> them involves the
+  <span>structured clone</span> algorithm.</p>
+
   <p>An element implementing the <code>HTMLHyperlinkElementUtils</code> mixin has an associated <dfn
-  data-noexport="">reinitialise url</dfn>, which runs these steps:</p>
+  data-noexport="">reinitialise url</dfn> algorithm, which runs these steps:</p>
 
   <ol>
    <li><p>If element's <span data-x="concept-hyperlink-url">url</span> is null or its