.toctree-wrapper .reference.external::after {
    content: url("data:image/svg+xml;charset=utf-8,%3Csvg width='16' height='16' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' stroke-width='1.5' stroke='white' fill='none' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M0 0h24v24H0z' stroke='none'/%3E%3Cpath d='M11 7H6a2 2 0 0 0-2 2v9a2 2 0 0 0 2 2h9a2 2 0 0 0 2-2v-5M10 14 20 4M15 4h5v5'/%3E%3C/svg%3E");
    margin: 0 .25rem;
    vertical-align: middle;
}