mastodon/app/assets/stylesheets/lists.scss

.no-list {
  list-style: none;

  li {
    display: inline-block;
    margin: 0 5px;
  }
}

.recovery-codes {
  column-count: 2;
  height: 100px;
  li {
    list-style: decimal;
    margin-left: 20px;
  }
}