%p
  You have been invited
  - if inviter = @group_member.created_by
    by
    = link_to inviter.name, user_url(inviter)
  to join group
  = link_to @group.name, group_url(@group)
  as #{@group_member.human_access}.

%p
  = link_to 'Accept invitation', invite_url(@token)
  or
  = link_to 'decline', decline_invite_url(@token)