Render categories properly

i2p2www/pages/blog/post.html

@@ -1,10 +1,11 @@
 {% extends "global/layout.html" %}
+{%- from "global/macros" import render_categories with context -%}
 {% block title %}{{ title }} - {{ _('Blog') }}{% endblock %}
 {% block content %}
 <ul id="post-info">
   <li class="date">{{ meta.date }}</li>
   <li class="author">{{ meta.author }}</li>
-  <li class="category">{{ meta.category }}</li>
+  <li class="category">{{ render_categories(meta.category)|safe }}</li>
 </ul>
 {% autoescape false %}
 {{ body }}

i2p2www/pages/global/macros

@@ -31,3 +31,10 @@
   {%- endif %}
   </div>
 {%- endmacro -%}
+
+{%- macro render_categories(categories) -%}
+{%- if categories and categories|length %}
+{%- for category in categories %}{{ category }}{% if not loop.last %}, {% endif %}{% endfor %}
+{%- else %}{{ _('None') }}
+{%- endif %}
+{%- endmacro %}