Add glyphicon

app/helpers/application_helper.rb

@@ -3,6 +3,10 @@ module ApplicationHelper
     bootstrap_classes[flash_type] || flash_type.to_s
   end
 
+  def glyph(icon)
+    content_tag(:i, class: "glyphicon glyphicon-#{icon}") {}
+  end
+
   private
 
   def bootstrap_classes

app/views/users/index.html.erb

@@ -16,7 +16,8 @@
     <td><%= user.created_at %></td>
     <td><%= user.updated_at %></td>
     <td>
-      <%= link_to '+', friendships_path(:friend_id => user), :method => :post %>
+      <%= link_to glyph('plus'), friendships_path(:friend_id => user),
+        :method => :post %>
     </td>
   </tr>
 <% end %>