User Relationship tokens defined incorrectly

Activity shows these tokens to users:

function user_relationshipsactivity_token_list($type = 'all') {
  if ($type == 'user_relationshipsactivity') {
    $tokens['user_relationshipsactivity'] = array(
      'requester-name' => t('Person who issued the request'),
      'requester-id' => t('User id of the person who issued the request'),
      'requester-link' => t('Link to person who issued the request'),
      'requestee-name' => t('Person to whom the request was issued'),
      'requestee-id' => t('User id of the person to whom the request was issued'),
      'requestee-link' => t('Link to person who received the request'),
      'relationship' => t('The name of the relationship'),
      'relationship-plural' => t('The plural name of the relationship'),
      'x-is-blah-of-y' => t('Eg: Sam is a fan of Susan'),
      'x-and-y-are-blahs' => t('Eg: Sam and Susan are friends'),
      'the-other-person-name' => t('In any relationship, the name of the person who is not "you". Should only be used in messages visible to the individual user.'),
      'the-other-person-link' => t('In any relationship, a link to the person who is not "you". Should only be used in messages visible to the individual user.'),
    );

    return $tokens;
  }
}

It then defines only these tokens:

    $tokens = array(
      'requester' => $requesters[$data['requester-uid']]['link'],
      'requestee' => $requestees[$data['requestee-uid']]['link'],
      'x-is-blah-of-y' => t('!sam is a @fan of !susan', array('!sam' => $requesters[$data['requester-uid']]['link'], '@fan' => $data['relationship'], '!susan' => $requestees[$data['requestee-uid']]['link'])),
      'x-and-y-are-blahs' => t('!sam and !susan are @friends', array('!sam' => $requesters[$data['requester-uid']]['link'], '!susan' => $requestees[$data['requestee-uid']]['link'], '@friends' => $data['relationship-plural'])),
    );

  $data = array(
    'requester-uid'         => $relationship->requester_id,
    'requestee-uid'         => $relationship->requestee_id,
    'relationship'          => $relationship->name,
    'relationship-plural'   => $relationship->plural_name,
    'relationship-approved' => $relationship->approved,
  );

So [requester-X], [requestee-X], and [the-other-person-X] don't work because they were never defined.