db/migrate/20140202020202_create_bookmarks.rb in blacklight-6.0.0.pre3 vs db/migrate/20140202020202_create_bookmarks.rb in blacklight-6.0.0.pre4

@@ -1,13 +1,12 @@
-# -*- encoding : utf-8 -*-
 class CreateBookmarks < ActiveRecord::Migration
   def self.up
     create_table :bookmarks do |t|
       t.integer :user_id, :null=>false
       t.string :user_type
       t.string :document_id
       t.string :title
-      t.timestamps
+      t.timestamps null: false
     end
   end
 
   def self.down
     drop_table :bookmarks