use strict;
use warnings;

use feature 'say';

use Tie::File;

my $file = 'test_file.txt';

tie @lines, 'Tie::File', $file or die "Unable to open file '$file': $!";

my $line_number = 1;
foreach my $line (@lines) {
    say "$line_number: $line";
    $line_number++;
}