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  1. or download this
    #!/usr/bin/perl
use strict;
use warnings 'all';
...
print $stdout, "***End***\n";

# CLEANup should follow
  2. or download this
    Scalar value @_[0] better written as $_[0] at .../Safe/World/ScanPack.
+pm line 88.
Scalar value @_[0] better written as $_[0] at .../Safe/World.pm line 3
+45.
Useless use of hash element in void context at .../Safe/World.pm line 
+1007.
...
Use of uninitialized value in numeric ne (!=) at .../Safe/World.pm lin
+e 386.
Use of uninitialized value in string ne at .../Safe/World/stdout.pm li
+ne 218.
Use of uninitialized value in string ne at .../Safe/World/stdout.pm li
+ne 218.