user page bug fix, drop extra / after source URL in update profile webmention form

templates/user_addresses.html

@@ -15,7 +15,7 @@
 
       {% if g.user.LABEL != 'activitypub' %}
       <form method="post" action="/webmention-interactive">
-        <input name="source" type="hidden" value="{{ g.user.web_url() }}/" />
+        <input name="source" type="hidden" value="{{ g.user.web_url() }}" />
         <button id="update-profile-button" type="submit"
                 title="Update profile from web site"
                 class="btn btn-default glyphicon glyphicon-refresh"></button>