Only set state to unsent in abort() when done

Fixes #54.

Overview.html

@@ -7,7 +7,7 @@
 
 <p><a class="logo" href="https://whatwg.org/"><img alt="WHATWG" height="100" src="https://resources.whatwg.org/logo-xhr.svg" width="100"></a>
 <h1 id="xmlhttprequest-ls">XMLHttpRequest</h1>
-<h2 class="no-num no-toc" id="living-standard-—-last-updated-22-march-2016">Living Standard — Last Updated 22 March 2016</h2>
+<h2 class="no-num no-toc" id="living-standard-—-last-updated-25-march-2016">Living Standard — Last Updated 25 March 2016</h2>
 
 <dl>
  <dt>Participate:
@@ -1302,8 +1302,8 @@ <h4 id="the-abort()-method"><span class="secno">4.5.7 </span>The <code title="">
    <dd>Cancels any network activity.
   </dl>
 
-<p>The <dfn id="dom-xmlhttprequest-abort" title="dom-XMLHttpRequest-abort"><code>abort()</code></dfn> method must run
-these steps:
+<p>The <dfn id="dom-xmlhttprequest-abort" title="dom-XMLHttpRequest-abort"><code>abort()</code></dfn> method, when invoked, must
+run these steps:
 
 <ol>
  <li><p><a href="#terminate-the-request">Terminate the request</a>.
@@ -1314,7 +1314,8 @@ <h4 id="the-abort()-method"><span class="secno">4.5.7 </span>The <code title="">
  <a href="#request-error-steps">request error steps</a> for event <a href="#event-xhr-abort"><code title="event-xhr-abort">abort</code></a>.
 
  <li>
-  <p>Set <a href="#concept-xmlhttprequest-state" title="concept-XMLHttpRequest-state">state</a> to <i title="">unsent</i>.
+  <p>If <a href="#concept-xmlhttprequest-state" title="concept-XMLHttpRequest-state">state</a> is <i>done</i>, set
+  <a href="#concept-xmlhttprequest-state" title="concept-XMLHttpRequest-state">state</a> to <i>unsent</i>.
 
   <p class="note">No <a href="#event-xhr-readystatechange"><code title="event-xhr-readystatechange">readystatechange</code></a> event
   is dispatched.

Overview.src.html

@@ -1254,8 +1254,8 @@ <h4>The <code title>abort()</code> method</h4>
    <dd>Cancels any network activity.
   </dl>
 
-<p>The <dfn title="dom-XMLHttpRequest-abort"><code>abort()</code></dfn> method must run
-these steps:
+<p>The <dfn title="dom-XMLHttpRequest-abort"><code>abort()</code></dfn> method, when invoked, must
+run these steps:
 
 <ol>
  <li><p><span>Terminate the request</span>.
@@ -1266,7 +1266,8 @@ <h4>The <code title>abort()</code> method</h4>
  <span>request error steps</span> for event <code title=event-xhr-abort>abort</code>.
 
  <li>
-  <p>Set <span title=concept-XMLHttpRequest-state>state</span> to <i title>unsent</i>.
+  <p>If <span title=concept-XMLHttpRequest-state>state</span> is <i>done</i>, set
+  <span title=concept-XMLHttpRequest-state>state</span> to <i>unsent</i>.
 
   <p class=note>No <code title="event-xhr-readystatechange">readystatechange</code> event
   is dispatched.