gistfile1.js

       connection.putChangeset(
            history.changes(),
            e.comment,
            history.imagery_used(),
            function(err, changeset_id) {
                loading.remove();
                if (err) {
                    iD.ui.confirm(context.container())
                        .select('.modal-section.header')
                        .append('h3')
                        .text(t('save.error'));
                    iD.ui.confirm(context.container())
                        .select('.modal-section.message-text')
                        .append('p')
                        .text(err.responseText);
                } else {
                    history.reset();
                    map.flush().redraw();
                    success(e, changeset_id);
                }
            });
    }

var confirm = iD.ui.confirm(context.container());
confirm
    .select('.modal-section.header')
    .append('h3')
    .text(t('save.error'));
confirm;
    .select('.modal-section.message-text')
    .append('p')
    .text(err.responseText);