$line =~ s/[\x00-\x06\x08\x0a-\x19\x1b-\x1f\x80-\x9f]/./g; # immutable CSI sequence + control characters
if ($sort && $sort eq 'D') {
$line = " " unless length($line);
$line =~ s/[\x00-\x06\x08\x0a-\x19\x1b-\x1f\x80-\x9f]/./g; # immutable CSI sequence + control characters
if ($sort && $sort eq 'D') {
$line = " " unless length($line);