Fix #63: Ban insertNode() of Range's start node

dom.bs

@@ -7672,17 +7672,10 @@ To <dfn export id=concept-range-insert for=Range>insert</dfn> a <a>node</a>
 <var>range</var>, run these steps:
 
 <ol>
-  <!-- Chrome 12 dev throws "HierarchyRequestError" if node is the same
-  as the start node (at least for text nodes). This doesn't seem to make
-  much sense, since insertBefore() works fine to move a node to its current
-  position, and other browsers disagree, so the spec follows the majority.
-  -->
  <li>If <var>range</var>'s <a>start node</a>
- is either a {{ProcessingInstruction}} or {{Comment}}
- <a>node</a>, or a {{Text}}
- <a>node</a> whose <a>parent</a>
- is null, <a>throw</a> an {{HierarchyRequestError}}
- exception.
+ is a {{ProcessingInstruction}} or {{Comment}} <a>node</a>, is a {{Text}}
+ <a>node</a> whose <a>parent</a> is null, or is <var>node</var>, <a>throw</a>
+ an {{HierarchyRequestError}} exception.
 
  <!--
  Behavior for Text node with null parent:

dom.html

@@ -69,7 +69,7 @@
   <div class="head">
    <p data-fill-with="logo"><a class="logo" href="https://whatwg.org/"> <img alt="WHATWG" height="100" src="https://resources.whatwg.org/logo-dom.svg"> </a> </p>
    <h1 class="p-name no-ref allcaps" id="title">DOM</h1>
-   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Living Standard — Last Updated <time class="dt-updated" datetime="2015-10-05">5 October 2015</time></span></h2>
+   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Living Standard — Last Updated <time class="dt-updated" datetime="2015-10-06">6 October 2015</time></span></h2>
    <div data-fill-with="spec-metadata">
     <dl>
      <dt>Participate:
@@ -3613,7 +3613,7 @@ <h3 class="heading settled" data-level="5.2" id="interface-range"><span class="s
    <p>To <dfn data-dfn-for="Range" data-dfn-type="dfn" data-export="" id="concept-range-insert">insert<a class="self-link" href="#concept-range-insert"></a></dfn> a <a data-link-type="dfn" href="#concept-node">node</a> <var>node</var> into a <a data-link-type="dfn" href="#concept-range">range</a> <var>range</var>, run these steps:</p>
    <ol>
     <li>
-     If <var>range</var>’s <a data-link-type="dfn" href="#concept-range-start-node">start node</a> is either a <code class="idl"><a data-link-type="idl" href="#processinginstruction">ProcessingInstruction</a></code> or <code class="idl"><a data-link-type="idl" href="#comment">Comment</a></code> <a data-link-type="dfn" href="#concept-node">node</a>, or a <code class="idl"><a data-link-type="idl" href="#text">Text</a></code> <a data-link-type="dfn" href="#concept-node">node</a> whose <a data-link-type="dfn" href="#concept-tree-parent">parent</a> is null, <a data-link-type="dfn" href="https://heycam.github.io/webidl/#dfn-throw">throw</a> an <code class="idl"><a data-link-type="idl" href="https://heycam.github.io/webidl/#hierarchyrequesterror">HierarchyRequestError</a></code> exception. 
+     If <var>range</var>’s <a data-link-type="dfn" href="#concept-range-start-node">start node</a> is a <code class="idl"><a data-link-type="idl" href="#processinginstruction">ProcessingInstruction</a></code> or <code class="idl"><a data-link-type="idl" href="#comment">Comment</a></code> <a data-link-type="dfn" href="#concept-node">node</a>, is a <code class="idl"><a data-link-type="idl" href="#text">Text</a></code> <a data-link-type="dfn" href="#concept-node">node</a> whose <a data-link-type="dfn" href="#concept-tree-parent">parent</a> is null, or is <var>node</var>, <a data-link-type="dfn" href="https://heycam.github.io/webidl/#dfn-throw">throw</a> an <code class="idl"><a data-link-type="idl" href="https://heycam.github.io/webidl/#hierarchyrequesterror">HierarchyRequestError</a></code> exception. 
      <p></p>
     <li>Let <var>referenceNode</var> be null. 
     <li>If <var>range</var>’s <a data-link-type="dfn" href="#concept-range-start-node">start node</a> is a <code class="idl"><a data-link-type="idl" href="#text">Text</a></code> <a data-link-type="dfn" href="#concept-node">node</a>,
@@ -5109,8 +5109,8 @@ <h3 class="no-num heading settled" id="index-defined-here"><span class="content"
    <li><a href="#queue-a-mutation-observer-compound-microtask">queue a mutation observer compound microtask</a><span>, in §4.3</span>
    <li><a href="#queue-a-mutation-record">queue a mutation record</a><span>, in §4.3.2</span>
    <li><a href="#concept-document-quirks">quirks mode</a><span>, in §4.5</span>
-   <li><a href="#range">Range</a><span>, in §5.2</span>
    <li><a href="#dom-range-range">Range()</a><span>, in §5.2</span>
+   <li><a href="#range">Range</a><span>, in §5.2</span>
    <li><a href="#concept-range">range</a><span>, in §5.2</span>
    <li><a href="#rangeexception">RangeException</a><span>, in §8.3</span>
    <li><a href="#concept-MO-queue">record queue</a><span>, in §4.3.1</span>