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  1. or download this
    open my $fh,'>',$file_name || die "can't open $file_name for writing: 
+$!\n";
  2. or download this
    open my $fh,'>',$file_name or die "can't open $file_name for writing: 
+$!\n";
  3. or download this
    open(my $fh,'>',$file_name) || die "can't open $file_name for writing:
+ $!\n";