# File lib/puppet/util/diff.rb, line 6
 6:     def diff(old, new)
 7:         command = [Puppet[:diff]]
 8:         if args = Puppet[:diff_args] and args != ""
 9:             command << args
10:         end
11:         command << old << new
12:         execute(command, :failonfail => false)
13:     end