/usr/share/perl5/Test/Deep/All.pm is in libtest-deep-perl 1.127-1.
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  | use strict;
use warnings;
package Test::Deep::All;
use Scalar::Util ();
use Test::Deep::Cmp;
sub init
{
  my $self = shift;
  my @list = map {
    (Scalar::Util::blessed($_) && $_->isa('Test::Deep::All'))
    ? @{ $_->{val} }
    : $_
  } @_;
  $self->{val} = \@list;
}
sub descend
{
  my $self = shift;
  my $got = shift;
  my $data = $self->data;
  my $index = 1;
  foreach my $cmp (@{$self->{val}})
  {
    $data->{index} = $index;
    $index++;
    next if Test::Deep::descend($got, $cmp);
    return 0
  }
  return 1;
}
sub render_stack
{
  my $self = shift;
  my $var = shift;
  my $data = shift;
  my $max = @{$self->{val}};
  return "(Part $data->{index} of $max in $var)";
}
1;
 |