Apply cc810ccb to the 3rd variant

wiki/src/install/expert/usb.mdwn

@@ -186,7 +186,7 @@ Install Tails using <span class="command">dd</span>
    <p>If you get a <span class="guilabel">Permission denied</span> error, try
    adding <code>sudo</code> at the beginning of the command:</p>
 
-   <p class="pre command">sudo dd if=<span class="command-placeholder">tails.img</span> of=<span class="command-placeholder">device</span> bs=16M && sync</p>
+   <p class="pre command">sudo dd if=<span class="command-placeholder">tails.img</span> of=<span class="command-placeholder">device</span> bs=16M oflag=direct status=progress</p>
    </div>
 
    The installation is complete after the command prompt reappears.