Fix mixed & symbols

<?php
/** for when some entries are using & and some just & to standardize to keep 
 ** facet from ending up with 2 facet_values that cause the same label to display in 2 choices
 ** generally happens with custom fields not taxonomies
 ** could be used for other encoded characters
 **/
add_filter( 'facetwp_index_row', function( $params, $class ) {
    if ( strpos( $params['facet_display_value'], '&' ) > 0 ) {
        $params['facet_display_value'] = str_replace( '&', '&', $params['facet_display_value'] ); // make & standard
        $params['facet_value'] = str_replace( '&', '', $params['facet_display_value'] ); // remove & to prevent md5 hash
    }
    return $params;
}, 10, 2 );