Fix test script for proper output.

--- ./t/djbish.plx

+++ ./t/djbish.plx

@@ -10,5 +10,5 @@ close SOUT

   or die "cannot close fd 1 - $!";

 chomp $read;

-exit 20 if $read eq "#!perl -w"; # the top line of this file

+exit 20 if $read eq "#!/usr/bin/perl -w"; # the top line of this file

 exit 1;