bootstrapvalidator/dist/css/bootstrapValidator.css

/**
 * BootstrapValidator (https://github.com/nghuuphuoc/bootstrapvalidator)
 *
 * A jQuery plugin to validate form fields. Use with Bootstrap 3
 *
 * @author      http://twitter.com/nghuuphuoc
 * @copyright   (c) 2014 Nguyen Huu Phuoc
 * @license     MIT
 */

.bootstrap-validator-form .help-block {
    margin-bottom: 0;
}