.external-link {
    white-space: nowrap;
}

.external-link::after {
    content: "";
    display: inline-block;
    width: 14px;
    height: 14px;
    background-image: url('https://slimmebudgettips.nl/images/open-external-link-icon.svg');
    background-size: contain;
    background-repeat: no-repeat;
    margin-left: 2px;
    vertical-align: middle;
}