Enclose paper titles within typographic quotes

wp/index.md

@@ -12,7 +12,7 @@ title: Working Papers
 <ol>
 {% for wp in site.data.wp limit:5 %}
 <li value = "{{ wpn }}">
-  {{ wp.authors }} ({{ wp.year }}), "<a href="{{ wp.url }}">{{ wp.title }}</a>"
+  {{ wp.authors }} ({{ wp.year }}), “<a href="{{ wp.url }}">{{ wp.title }}</a>”
   {% if wp.source_url %}(<a href="{{ wp.source_url }}">source</a>){% endif %}
   {% if wp.data_url %}(<a href="{{ wp.data_url }}">data</a>){% endif %}
   {% assign wpn = wpn | minus:1 %}