Docs: Various docblock corrections and improvements for changes introduced in 6.0.

See #54729


git-svn-id: https://develop.svn.wordpress.org/trunk@53302 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/widgets/class-wp-widget-media.php

@@ -467,7 +467,7 @@ abstract class WP_Widget_Media extends WP_Widget {
 	 *
 	 * @since 6.0.0
 	 *
-	 * @var string
+	 * @return string
 	 */
 	protected static function get_default_description() {
 		if ( self::$default_description ) {
@@ -483,7 +483,7 @@ abstract class WP_Widget_Media extends WP_Widget {
 	 *
 	 * @since 6.0.0
 	 *
-	 * @return string[]
+	 * @return (string|array)[]
 	 */
 	protected static function get_l10n_defaults() {
 		if ( ! empty( self::$l10n_defaults ) ) {