/usr/share/perl5/Ninka/FileCleaner.pm is in ninka 1.3.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67  | package Ninka::FileCleaner;
use strict;
use warnings;
use IPC::Open3 'open3';
use Symbol 'gensym';
sub new {
    my ($class, %args) = @_;
    my $self = bless({}, $class);
    die "parameter 'input_file' is mandatory" unless exists $args{input_file};
    $self->{verbose} = ($args{verbose} // 0) == 1;
    $self->{input_file} = $args{input_file};
    return $self;
}
sub execute {
    my ($self) = @_;
    my $input_file = $self->{input_file};
        
    my $original = $input_file;
    $input_file =~ s/'/\\'/g;
    $input_file =~ s/\$/\\\$/g;
    $input_file =~ s/;/\\;/g;
    $input_file =~ s/ /\\ /g;
    print "Starting: $original;\n" if ($self->{verbose});
    return $input_file;
}
1;
__END__
=head1 NAME
Ninka::FileCleaner - Escape disturbing characters
=head1 DESCRIPTION
Escapes apostrophes and other potentially disturbing characters
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2009-2014  Yuki Manabe and Daniel M. German, 2015 Daniele Fognini and Johannes Najjar
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
=cut
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