diff -r 34716fd837a4 -r be944660c56a wp/wp-admin/includes/taxonomy.php
--- a/wp/wp-admin/includes/taxonomy.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-admin/includes/taxonomy.php	Wed Sep 21 18:19:35 2022 +0200
@@ -183,7 +183,7 @@
  * @since 2.0.0
  *
  * @param array $catarr The 'cat_ID' value is required. All other keys are optional.
- * @return int|bool The ID number of the new or updated Category on success. Zero or FALSE on failure.
+ * @return int|false The ID number of the new or updated Category on success. Zero or FALSE on failure.
  */
 function wp_update_category( $catarr ) {
 	$cat_ID = (int) $catarr['cat_ID'];
@@ -240,7 +240,7 @@
  *
  * @param int    $post_id
  * @param string $taxonomy Optional. The taxonomy for which to retrieve terms. Default 'post_tag'.
- * @return string|bool|WP_Error
+ * @return string|false|WP_Error
  */
 function get_tags_to_edit( $post_id, $taxonomy = 'post_tag' ) {
 	return get_terms_to_edit( $post_id, $taxonomy );
@@ -253,7 +253,7 @@
  *
  * @param int    $post_id
  * @param string $taxonomy Optional. The taxonomy for which to retrieve terms. Default 'post_tag'.
- * @return string|bool|WP_Error
+ * @return string|false|WP_Error
  */
 function get_terms_to_edit( $post_id, $taxonomy = 'post_tag' ) {
 	$post_id = (int) $post_id;
@@ -278,7 +278,7 @@
 		$term_names[] = $term->name;
 	}
 
-	$terms_to_edit = esc_attr( join( ',', $term_names ) );
+	$terms_to_edit = esc_attr( implode( ',', $term_names ) );
 
 	/**
 	 * Filters the comma-separated list of terms available to edit.