Docs: Use more consistent descriptions for void|false return values.

See #51800.

git-svn-id: https://develop.svn.wordpress.org/trunk@49935 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-customize-setting.php

@@ -513,7 +513,8 @@ class WP_Customize_Setting {
 	 *
 	 * @since 3.4.0
 	 *
-	 * @return void|false False if cap check fails or value isn't set or is invalid.
+	 * @return void|false Void on success, false if cap check fails
+	 *                    or value isn't set or is invalid.
 	 */
 	final public function save() {
 		$value = $this->post_value();

src/wp-includes/functions.php

@@ -837,7 +837,7 @@ function wp_extract_urls( $content ) {
  *
  * @param string|null $content Post content. If `null`, the `post_content` field from `$post` is used.
  * @param int|WP_Post $post    Post ID or post object.
- * @return void|false Returns false if post is not found.
+ * @return void|false Void on success, false if the post is not found.
  */
 function do_enclose( $content, $post ) {
 	global $wpdb;

src/wp-includes/taxonomy.php

@@ -3531,7 +3531,8 @@ function get_object_term_cache( $id, $taxonomy ) {
  *
  * @param string|int[]    $object_ids  Comma-separated list or array of term object IDs.
  * @param string|string[] $object_type The taxonomy object type or array of the same.
- * @return void|false False if all of the terms in `$object_ids` are already cached.
+ * @return void|false Void on success or if the `$object_ids` parameter is empty,
+ *                    false if all of the terms in `$object_ids` are already cached.
  */
 function update_object_term_cache( $object_ids, $object_type ) {
 	if ( empty( $object_ids ) ) {

src/wp-includes/theme.php

@@ -2492,7 +2492,7 @@ function get_theme_starter_content() {
  *                        'disable-custom-font-sizes', 'editor-color-palette', 'editor-font-sizes',
  *                        'editor-styles', 'wp-block-styles', and 'core-block-patterns'.
  * @param mixed  ...$args Optional extra arguments to pass along with certain features.
- * @return void|false False on failure, void otherwise.
+ * @return void|false Void on success, false on failure.
  */
 function add_theme_support( $feature, ...$args ) {
 	global $_wp_theme_features;

src/wp-includes/user.php

@@ -1537,7 +1537,7 @@ function sanitize_user_field( $field, $value, $user_id, $context ) {
  * @since 3.0.0
  *
  * @param object|WP_User $user User object or database row to be cached
- * @return void|false Returns false on failure.
+ * @return void|false Void on success, false on failure.
  */
 function update_user_caches( $user ) {
 	if ( $user instanceof WP_User ) {