Fix ruby syntax errors in railties/guides docs

railties/guides/source/active_record_validations_callbacks.textile

@@ -355,7 +355,7 @@ This helper validates that the specified attributes are not empty. It uses the +
 
 <ruby>
 class Person < ActiveRecord::Base
-  validates :name, :presence => true, :login, :email
+  validates :name, :login, :email, :presence => true
 end
 </ruby>
 

railties/guides/source/security.textile

@@ -550,7 +550,7 @@ Ruby uses a slightly different approach than many other languages to match the e
 
 <ruby>
 class File < ActiveRecord::Base
-  validates :name, format => /^[\w\.\-\+]+$/
+  validates :name, :format => /^[\w\.\-\+]+$/
 end
 </ruby>