document.rb in bullet-5.6.1

- old
+ new

@@ -1,5 +1,5 @@
 class Document < ActiveRecord::Base
-  has_many :children, class_name: "Document", foreign_key: 'parent_id'
-  belongs_to :parent, class_name: "Document", foreign_key: 'parent_id'
+  has_many :children, class_name: 'Document', foreign_key: 'parent_id'
+  belongs_to :parent, class_name: 'Document', foreign_key: 'parent_id'
   belongs_to :author
 end