Do not remove child from its parent when replacing a node by itself

dom.bs

@@ -1600,6 +1600,14 @@ steps:
  <var>node</var> into <var>parent</var>'s
  <a>node document</a>.
 
+ <li>Let <var>removedNodes</var> be the empty list.
+
+ <li>If <var>child</var>'s parent is not null, set <var>removedNodes</var> to a list
+  solely containing <var>child</var> and remove <var>child</var> from its <var>parent</var>
+  with the <i>suppress observers flag</i> set.
+
+  <p class="note no-backref">The above can only be false if <var>child</var> is <var>node</var>.
+
  <li><a>Remove</a> <var>child</var>
  from its <var>parent</var> with the
  <i>suppress observers flag</i> set.
@@ -1614,7 +1622,7 @@ steps:
  the <i>suppress observers flag</i> set.
 
  <li><a>Queue a mutation record</a> of "<code>childList</code>" for target
- <var>parent</var> with addedNodes <var>nodes</var>, removedNodes a list solely containing
+ <var>parent</var> with addedNodes <var>nodes</var>, removedNodes <var>removedNodes</var>
  <var>child</var>, nextSibling <var>reference child</var>, and previousSibling
  <var>previousSibling</var>.
 

dom.html

@@ -982,11 +982,16 @@ <h4 class="heading settled" data-level="4.2.1" id="mutation-algorithms"><span cl
     <li>
      <p>Let <var>previousSibling</var> be <var>child</var>’s <a data-link-type="dfn" href="#concept-tree-previous-sibling">previous sibling</a>. </p>
     <li><a data-link-type="dfn" href="#concept-node-adopt">Adopt</a> <var>node</var> into <var>parent</var>’s <a data-link-type="dfn" href="#concept-node-document">node document</a>. 
+    <li>Let <var>removedNodes</var> be the empty list. 
+    <li>
+     If <var>child</var>’s parent is not null, set <var>removedNodes</var> to a list
+  solely containing <var>child</var> and remove <var>child</var> from its <var>parent</var> with the <i>suppress observers flag</i> set. 
+     <p class="note no-backref" role="note">The above can only be false if <var>child</var> is <var>node</var>. </p>
     <li><a data-link-type="dfn" href="#concept-node-remove">Remove</a> <var>child</var> from its <var>parent</var> with the <i>suppress observers flag</i> set. 
     <li>Let <var>nodes</var> be <var>node</var>’s <a data-link-type="dfn" href="#concept-tree-child">children</a> if <var>node</var> is a <code class="idl"><a data-link-type="idl" href="#documentfragment">DocumentFragment</a></code> <a data-link-type="dfn" href="#concept-node">node</a>, and a list containing solely <var>node</var> otherwise. 
     <li><a data-link-type="dfn" href="#concept-node-insert">Insert</a> <var>node</var> into <var>parent</var> before <var>reference child</var> with
  the <i>suppress observers flag</i> set. 
-    <li><a data-link-type="dfn" href="#queue-a-mutation-record">Queue a mutation record</a> of "<code>childList</code>" for target <var>parent</var> with addedNodes <var>nodes</var>, removedNodes a list solely containing <var>child</var>, nextSibling <var>reference child</var>, and previousSibling <var>previousSibling</var>. 
+    <li><a data-link-type="dfn" href="#queue-a-mutation-record">Queue a mutation record</a> of "<code>childList</code>" for target <var>parent</var> with addedNodes <var>nodes</var>, removedNodes <var>removedNodes</var> <var>child</var>, nextSibling <var>reference child</var>, and previousSibling <var>previousSibling</var>. 
     <li>Return <var>child</var>. 
    </ol>
    <p>To <dfn data-dfn-for="Node" data-dfn-type="dfn" data-export="" id="concept-node-replace-all">replace all<a class="self-link" href="#concept-node-replace-all"></a></dfn> with a <var>node</var> within a <var>parent</var>, run these steps:</p>