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  1. or download this
    #!/usr/bin/perl
use strict;
use warnings;
...
    }
    printf "%-15s%s", qq("$i"), qq( => "$o"\n);
}
  2. or download this
    #!/usr/bin/perl
use strict;
use warnings;
...
    while (length $o > $max_len and $o =~ s/.$//){}
    printf "%-15s%s", qq("$i"), qq( => "$o"\n);
}
  3. or download this
    #!/usr/bin/perl
use strict;
use warnings;
...
    $o =~ s/.{$extra}$//    if $extra = $calc_code->($o);
    printf "%-15s%s", qq("$i"), qq( => "$o"\n);
}