Collapse blank/srcdoc inheritance scenarios

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@@ -96022,7 +96022,7 @@ location.href = '#foo';</code></pre>
      </li>
 
      <li>
-      <p>If <var>url</var> is <code>about:blank</code>, then:</p>
+      <p>If <var>url</var> is <code>about:blank</code> or <code>about:srcdoc</code>, then:</p>
 
       <ol>
        <li><p>Set <var>documentState</var>'s <span data-x="document-state-origin">origin</span> to
@@ -96034,20 +96034,6 @@ location.href = '#foo';</code></pre>
       </ol>
      </li>
 
-     <li>
-      <p>Otherwise, if <var>url</var> is <code>about:srcdoc</code>, then:</p>
-
-      <ol>
-       <li><p>Set <var>documentState</var>'s <span data-x="document-state-origin">origin</span> to
-       <var>navigable</var>'s <span data-x="nav-parent">parent</span>'s <span
-       data-x="nav-document">active document</span>'s <span
-       data-x="concept-document-origin">origin</span>.</p></li>
-
-       <li><p>Set <var>documentState</var>'s <span data-x="document-state-about-base-url">about base
-       URL</span> to <var>initiatorBaseURLSnapshot</var>.</p></li>
-      </ol>
-     </li>
-
      <li><p>Let <var>historyEntry</var> be a new <span>session history entry</span>, with its <span
      data-x="she-url">URL</span> set to <var>url</var> and its <span
      data-x="she-document-state">document state</span> set to