Added site.source to GitHub edit link

_layouts/default.html

@@ -159,7 +159,7 @@ layout: table_wrappers
                   site.gh_edit_view_mode
                 %}
                   <p class="text-small text-grey-dk-000 mb-0">
-                    <a href="{{ site.gh_edit_repository }}/{{ site.gh_edit_view_mode }}/{{ site.gh_edit_branch }}/{{ page.path }}" id="edit-this-page">{{ site.gh_edit_link_text }}</a>
+                    <a href="{{ site.gh_edit_repository }}/{{ site.gh_edit_view_mode }}/{{ site.gh_edit_branch }}/{{ site.source }}/{{ page.path }}" id="edit-this-page">{{ site.gh_edit_link_text }}</a>
                   </p>
                 {% endif %}
               </div>