api changes: add table wrapper

Author: fabioarnold

coding/api-changes/index.html

@@ -268,6 +268,7 @@ <h3 id="new-return-type-for-create_accounts-and-create_transfers"><a
 <code>CreateTransfer<b>s</b>Result</code> were renamed to the singular
 form, <code>CreateAccountResult</code> and
 <code>CreateTransferResult</code>.</p>
+<div class="table">
 <table>
 <tr><th>Before</th><th>After</th></tr>
 <tr><td>
@@ -328,6 +329,7 @@ <h3 id="new-return-type-for-create_accounts-and-create_transfers"><a
 </div>
 </td></tr>
 </table>
+</div>
 
 <h3 id="query-limits"><a href="#query-limits" class="anchor">Query
 limits.</a></h3>