unshift @{ $agent->{version_list} }, @{ $amend->{version_list} };
$agent->{browser} = sprintf '%s (former %s)',
$agent->{browser}, $amend->{browser};
unshift @{ $agent->{version_list} }, @{ $amend->{version_list} };
$agent->{browser} = sprintf '%s (former %s)',
$agent->{browser}, $amend->{browser};