Use 'else' clause instead of separate 'unless'.

Signed-off-by: Michel Hidalgo <michel@ekumenlabs.com>

Author: hidmic

_includes/package_links.html

@@ -14,8 +14,11 @@
 
 <div class="list-group list-group-sm {%if horizontal%}list-group-horizontal list-group-justified{%endif%}">
   <a class="{{list_group_class}} {% if package.data.docs_uri == '' %}disabled{% endif %}" target="_blank"
-     {% unless package.data.docs_uri == '' %}href="{{ package.data.docs_uri }}"{% endunless %}
-     {% if package.data.docs_uri == '' %}href="javascript:void(0)"{% endif %}
+     {% if package.data.docs_uri == '' %}
+     href="javascript:void(0)"
+     {% else %}
+     href="{{ package.data.docs_uri }}"
+     {% endif %}
      title="View API documentation">
        <span style="margin-right: 5px;" class="glyphicon glyphicon-file"></span>
        {%if hide_link_labels%}<br>{%endif%}
@@ -54,8 +57,9 @@
      target="_blank"
      {% if package.snapshot.documented %}
      href="http://http404error.github.io/roseco/graph.html?id=ros.json&focus={{page.package_name}}&height=1&depth=2&tred=standard&metagroup=false&colorby=Health&direction=LR"
+     {% else %}
+     href="javascript:void(0);"
      {% endif %}
-     {% unless package.snapshot.documented %}href="javascript:void(0);"{% endunless %}
      title="View RosEco package graph">
        <span style="margin-right: 5px;" class="glyphicon glyphicon-tree-deciduous"></span>
        {%if hide_link_labels%}<br>{%endif%}