aj@junglist (branch: 0.23.2) ~/git/puppet$ puppet --version
0.23.2
aj@junglist (branch: 0.23.2) ~/git/puppet$ /tmp/test.pp
notice: hi thar!
notice: qaz
aj@junglist (branch: 0.23.2) ~/git/puppet$ cat /tmp/test.pp
#!/usr/bin/env puppet

define foo($bar='qaz') {
  notify { $bar: }
}

foo { "test": }
foo { "test2": bar => "hi thar!" }