iD/modules/ui/core/tooltipHtml.js

export function tooltipHtml(text, key) {
    var s = '<span>' + text + '</span>';
    if (key) {
        s += '<div class="keyhint-wrap">' +
            '<span> ' + (t('tooltip_keyhint')) + ' </span>' +
            '<span class="keyhint"> ' + key + '</span></div>';
    }
    return s;
}