diff --git a/lib/active_model/serializer.rb b/lib/active_model/serializer.rb
index 6e3ea6cb..8281e26e 100644
--- a/lib/active_model/serializer.rb
+++ b/lib/active_model/serializer.rb
@@ -48,7 +48,7 @@ module ActiveModel
   #     class PostSerializer < ActiveModel::Serializer
   #       attributes :title, :body
   #       has_many :comments
-  #     
+  #
   #       private
   #
   #       def attributes
@@ -56,7 +56,7 @@ module ActiveModel
   #         hash.merge!(:email => post.email) if author?
   #         hash
   #       end
-  #     
+  #
   #       def author?
   #         post.author == scope
   #       end