fix author/publisher matching (#123)

_includes/partial/publisher_link.html

@@ -1,3 +1,3 @@
-{% assign pub_small = include.pub | downcase %}
+{% assign pub_small = include.pub %}
 {% assign publisher_ref = site.publishers | where: 'short_name', pub_small | first %}
 <a href="{{ publisher_ref.url | relative_url }}">{{ publisher_ref.name }}</a>

_layouts/collection/collection_base.html

@@ -15,7 +15,7 @@ layout: default
     <h1>{{ page.title }}</h1>
     <p>
       {{ page.date | date_to_string }}
-      {% include partial/publisher_link.html pub= page.author %}
+      {% include partial/publisher_link.html pub=page.author %}
     </p>
     {{ content }}
 </article>