5.1 has dialog. https://www.w3.org/Bugs/Public/show_bug.cgi?id=21905

Overview.html

@@ -531,10 +531,10 @@ <h3 id="new-elements"><span class="secno">3.1 </span>New Elements</h3>
       <li><p><code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-time-element">time</a></code> represents a date
       and/or time.
 
-      <li><p>WHATWG HTML and W3C HTML 5.1 has <code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-data-element">data</a></code> which
+      <li><p>WHATWG HTML and W3C HTML5.1 has <code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-data-element">data</a></code> which
       allows content to be annotated with a machine-readable value.
 
-      <li><p>WHATWG HTML has <code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/commands.html#the-dialog-element">dialog</a></code> for showing a dialog.
+      <li><p>WHATWG HTML and W3C HTML5.1 has <code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/commands.html#the-dialog-element">dialog</a></code> for showing a dialog.
 
       <li><p><code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-ruby-element">ruby</a></code>,
       <code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-rt-element">rt</a></code>, and

Overview.src.html

@@ -503,10 +503,10 @@ <h3 id="new-elements">New Elements</h3>
       <li><p><code data-anolis-spec=html>time</code> represents a date
       and/or time.
 
-      <li><p>WHATWG HTML and W3C HTML 5.1 has <code data-anolis-spec=html>data</code> which
+      <li><p>WHATWG HTML and W3C HTML5.1 has <code data-anolis-spec=html>data</code> which
       allows content to be annotated with a machine-readable value.
 
-      <li><p>WHATWG HTML has <code data-anolis-spec=html>dialog</code> for showing a dialog.
+      <li><p>WHATWG HTML and W3C HTML5.1 has <code data-anolis-spec=html>dialog</code> for showing a dialog.
 
       <li><p><code data-anolis-spec=html>ruby</code>,
       <code data-anolis-spec=html>rt</code>, and

Overview.whatwg.html

@@ -482,10 +482,10 @@ <h3 id="new-elements"><span class="secno">3.1 </span>New Elements</h3>
       <li><p><code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-time-element">time</a></code> represents a date
       and/or time.
 
-      <li><p>WHATWG HTML and W3C HTML 5.1 has <code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-data-element">data</a></code> which
+      <li><p>WHATWG HTML and W3C HTML5.1 has <code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-data-element">data</a></code> which
       allows content to be annotated with a machine-readable value.
 
-      <li><p>WHATWG HTML has <code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/commands.html#the-dialog-element">dialog</a></code> for showing a dialog.
+      <li><p>WHATWG HTML and W3C HTML5.1 has <code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/commands.html#the-dialog-element">dialog</a></code> for showing a dialog.
 
       <li><p><code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-ruby-element">ruby</a></code>,
       <code class="external"><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-rt-element">rt</a></code>, and