Docs: In various @return tags, list the expected type first, instead of false.

Follow-up to [46696], [47060], [49926], [49927], [49929].

See #51800.

git-svn-id: https://develop.svn.wordpress.org/trunk@49963 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/taxonomy.php

@@ -4724,7 +4724,7 @@ function get_ancestors( $object_id = 0, $object_type = '', $resource_type = '' )
  *
  * @param int    $term_id  Term ID.
  * @param string $taxonomy Taxonomy name.
- * @return int|false False on error.
+ * @return int|false Parent term ID on success, false on failure.
  */
 function wp_get_term_taxonomy_parent_id( $term_id, $taxonomy ) {
 	$term = get_term( $term_id, $taxonomy );