blog/sass/themes/classic/partials/_pinboard.scss

#pinboard_linkroll {
  .pin-title, .pin-description {
    display: block;
    margin-bottom: .5em;
  }
  .pin-tag {
    @extend .aside-alt-link;
    &:after {
      content: ',';
    }
    &:last-child:after {
      content: '';
    }
  }
}