api-builder: fix class github link formatting

Author: petebacondarwin

tools/api-builder/angular.io-package/templates/class.template.html

@@ -159,7 +159,7 @@
   {% endif %}{% endfor %}
 {% endif %}
 
-.p(class="location-badge")
+p(class="location-badge").
   exported from {@link {$ doc.moduleDoc.id $} {$doc.moduleDoc.id $} }
   defined in {$ githubViewLink(doc) $}