separar las categorías con barras

app/views/posts/index.haml

@@ -110,6 +110,7 @@
                         - post.front_matter['categories'].each do |category|
                           = link_to site_posts_path(@site, **@filter_params.merge(category: category)) do
                             %span{ lang: post.locale, dir: dir }= category
+                          = '/' unless post.front_matter['categories'].last == category
 
                   %td
                     = post.created_at.strftime('%F')