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  1. or download this
    sub display_paragraph() {
   my $aref = shift;
...
      print "$line\n";
   }
}
  2. or download this
    use 5.010;
sub display_paragraph() {
...
      print "$line\n";
   }
}
  3. or download this
    sub display_paragraph() {
   my $aref = shift;
...
      print "$line\n";
   }
}