PDF Invoices & Packing Slips for WooCommerce: Replace color square with "(Color Preview)"

<?php
/**
 * PDF Invoices & Packing Slips for WooCommerce:
 * Replace color square with "(Color Preview)" on the PDF documents
 */
add_filter( 'wpo_wcpdf_get_html', function( $html, $document ) {
    $html = str_replace( '■', '(Color Preview) ', $html );
    $html = str_replace( '&#9632;', '(Color Preview) ', $html );
    return $html;
}, 10, 2);

// Alternative code to remove the square altogether (please choose just one code snippet!):

/**
 * PDF Invoices & Packing Slips for WooCommerce:
 * Remove color square from the PDF documents
 */
add_filter( 'wpo_wcpdf_get_html', function( $html, $document ) {
    $html = str_replace( '■', '', $html );
    $html = str_replace( '&#9632;', '', $html );
    return $html;
}, 10, 2);