Doc fix #3960 [jonrailsdev@shumi.org]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4142 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record/validations.rb

@@ -277,8 +277,8 @@ def evaluate_condition(condition, record)
       # Validates each attribute against a block.
       #
       #   class Person < ActiveRecord::Base
-      #     validates_each :first_name, :last_name do |record, attr|
-      #       record.errors.add attr, 'starts with z.' if attr[0] == ?z
+      #     validates_each :first_name, :last_name do |record, attr, value|
+      #       record.errors.add attr, 'starts with z.' if value[0] == ?z
       #     end
       #   end
       #