# 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