I believe this finishes up debug mode for list.  The testing is a little weak, but I believe all of the functionality is there.  Certainly enough for people to checkout and start beating up on.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@179632 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/www/debug_mode.html b/www/debug_mode.html
index da037ea..ba491b3 100644
--- a/www/debug_mode.html
+++ b/www/debug_mode.html
@@ -32,7 +32,7 @@
 <code>&lt;list&gt;</code>
 </p>
 </td>
-<td><!-- &#10003; --></td>
+<td align="center"> &#10003; </td>
 </tr>
 
 <tr>