This file is indexed.

/usr/lib/cd-hit/clstr_select.pl is in cd-hit 4.6.8-1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/usr/bin/perl

#my $by = shift;
my $min;
my $max;
#if ($by eq "size") {
  $min = shift;
  $max = shift;
#}

$no = 0;
$clstr = "";

while($ll=<>){
  if ($ll =~ /^>/) {
    if (($no >= $min) and ($no <= $max)) {
      print $clstr;
    }
    $clstr = $ll;
    $no = 0;
  }
  else {
    $clstr .= $ll;
    $no++;
  }
}
    if (($no >= $min) and ($no <= $max)) {
      print $clstr;
    }