README.mdown in association_callbacks-0.0.2 vs README.mdown in association_callbacks-0.1.0

@@ -24,11 +24,11 @@
       
       after_create :update_post_last_comment_at
       after_destroy :update_post_last_comment_at
       
       def update_post_last_comment_at
-        post.update_attributes!(:last_comment_at => post.comments.order('created_at').last.try(:created_at))
+        post.update_attributes!(last_comment_at: post.comments.order('created_at').last.try(:created_at))
       end
     end
 
 But, there is a problem here: we define `Post` denormalization callbacks into
 `Comment` model. IMHO, this is the wrong place. `Post` denormalization
@@ -38,15 +38,15 @@
 Here is how to do it with `association_callabacks`:
 
     class Post < ActiveRecord::Base
       has_many :comments
     
-      after_create :update_last_comment_at, :source => :comments
-      after_destroy :update_last_comment_at, :source => :comments
+      after_create :update_last_comment_at, source: :comments
+      after_destroy :update_last_comment_at, source: :comments
       
       def update_last_comment_at
-        update_attributes!(:last_comment_at => comments.order('created_at').last.try(:created_at))
+        update_attributes!(last_comment_at: comments.order('created_at').last.try(:created_at))
       end
     end
 
 You just have to specify `:source` option to your callbacks, and that's all!
 Note that `:source` option must be an existing association name.
@@ -58,19 +58,19 @@
       has_many :comments
       
       after_create :update_last_comment_at
       
       def update_last_comment_at(comment)
-        update_attributes!(:last_comment_at => comment.created_at)
+        update_attributes!(last_comment_at: comment.created_at)
       end
     end
 
 Association callbacks can also be defined as block:
 
     class Post < ActiveRecord::Base
       has_many :comments
       
-      after_destroy :source => :comments do |post|
+      after_destroy source: :comments do |post|
         post.decrement!(:comments_count)
       end
     end
 
 Another solution is to use [ActiveModel Observers](http://api.rubyonrails.org/classes/ActiveModel/Observer.html),
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