Use void instead of null where appropriate when pipe-delimiting @return types. If a @return only contains void, remove it.

See #32444.


git-svn-id: https://develop.svn.wordpress.org/trunk@32568 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-xmlrpc-server.php

@@ -291,7 +291,7 @@ class wp_xmlrpc_server extends IXR_Server {
 	 * @since 1.5.2
 	 *
 	 * @param string|array $data Escape single string or array of strings.
-	 * @return string|null Returns with string is passed, alters by-reference
+	 * @return string|void Returns with string is passed, alters by-reference
 	 *                     when array is passed.
 	 */
 	public function escape( &$data ) {