gitlab-org--gitlab-foss/app/assets/stylesheets/pages/ui_dev_kit.scss

.gitlab-ui-dev-kit {
  > h2 {
    margin: 35px 0 20px;
    font-weight: bold;
  }

  .example {
    &::before {
      content: "Example";
      color: #bbb;
    }

    padding: 15px;
    border: 1px dashed #ddd;
    margin-bottom: 15px;
  }
}