fixing learning object method call

app/helpers/learning_objects_helper.rb

@@ -86,7 +86,7 @@ module LearningObjectsHelper
 
   def highlighted_btn(url, _label = nil, _class = nil)
     link_to url, class: 'download btn btn-success', target: "_blank" do
-      "<i class='fa #{_class}'></i> #{_label}"
+      content_tag(:i, _label, class: "fa #{_class}").html_safe
     end
   end
 end