username = 'attacker';
$verify->email = 'attacker@example.com';
$verify->reason_to_join = "\nsecond line";
$verify->save();
$applicationHtml = (new CuratedRegisterNotifyAdmin($verify))->render();
expect($applicationHtml)->not->toContain('');
expect($applicationHtml)->toContain('<script>');
// Line breaks preserved via nl2br.
expect($applicationHtml)->toContain('
register_id = $verify->id;
$activity->message = '';
$activity->save();
$responseHtml = (new CuratedRegisterNotifyAdminUserResponse($activity))->render();
expect($responseHtml)->not->toContain('');
expect($responseHtml)->toContain('<script>');
});