Fixed space at end of string

pages/wot/2.php

@@ -30,4 +30,4 @@ Australia</p>
 
 <p><?=_("The only other way to receive assurance points is to have had your identity checked by a third party CA, whose policies are suitably set to not let identity fraud run rampant. Please contact us if you would like more details about this.")?></p>
 
-<p><?=_("Once you have received at least 100 Assurance Points you will have to pass a test called Assurer Challenge, which can be started at ").'<a href="https://cats.cacert.org/">https://cats.cacert.org/</a>!'?></p>
+<p><?=_("Once you have received at least 100 Assurance Points you will have to pass a test called Assurer Challenge, which can be started at").' <a href="https://cats.cacert.org/">https://cats.cacert.org/</a>!'?></p>