Support spaces in tags in base blog.

_includes/postslist.njk

@@ -3,11 +3,9 @@
   <li class="postlist-item{% if post.url == url %} postlist-item-active{% endif %}">
     <a href="{{ post.url | url }}" class="postlist-link">{% if post.data.title %}{{ post.data.title }}{% else %}<code>{{ post.url }}</code>{% endif %}</a>
     <time class="postlist-date" datetime="{{ post.date | htmlDateString }}">{{ post.date | readableDate }}</time>
-    {% for tag in post.data.tags %}
-      {%- if collections.tagList.indexOf(tag) != -1 -%}
-      {% set tagUrl %}/tags/{{ tag }}/{% endset %}
+    {% for tag in post.data.tags | filterTagList %}
+      {% set tagUrl %}/tags/{{ tag | slug }}/{% endset %}
       <a href="{{ tagUrl | url }}" class="post-tag">{{ tag }}</a>
-      {%- endif -%}
     {% endfor %}
   </li>
 {% endfor %}