fix "edit page" links

_includes/footer.html

@@ -21,7 +21,7 @@
       
       <div class="col l2 s12">
         <h5 class="white-text">Editing</h5>
-        <a href="{{site.repository}}/edit/master/{% if page.source %}{{ page.source }}{% else %}{{ page.path }}{% endif %}" title="Edit this page" class="waves-effect waves-teal btn-flat">
+        <a href="{{site.repository}}/-/edit/master/{% if page.source %}{{ page.source }}{% else %}{{ page.path }}{% endif %}" title="Edit this page" class="waves-effect waves-teal btn-flat">
           <i class="fa fa-pencil-square-o" aria-hidden="true"></i> Edit this page
         </a>
         <a href="{{site.repository}}/#repository-holding-the-sources-of-the-kwarcinfo-website"