Add DocBook style classes

wiki/src/news/version_2.9.mdwn

@@ -22,9 +22,9 @@ system used by Tails and Debian.</p>
 <p>To remain safe while using Tails 2.9:</p>
 
 <ul>
-<li>Do not use the <i>Synaptic</i> package manager.</li>
-<li>Do not use the <tt>apt-get</tt> or <tt>apt</tt> commands in the terminal.</li>
-<li>Do not use the [[<i>Additional software packages</i> persistence
+<li>Do not use the <span class="application">Synaptic</span> package manager.</li>
+<li>Do not use the <span class="command">apt-get</span> or <span class="command">apt</span> commands in the terminal.</li>
+<li>Do not use the [[<span class="guilabel">Additional software packages</span> persistence
 feature|doc/first_steps/persistence/configure#additional_software]].</li>
 </ul>