Coding Standards: Include one space after function keyword for closures.

Note: This is enforced by WPCS 3.0.0.

Reference: [https://github.com/WordPress/WordPress-Coding-Standards/pull/2328 WPCS: PR #2328 Core: properly check formatting of function declaration statements].

Props jrf.
See #59161, #58831.

git-svn-id: https://develop.svn.wordpress.org/trunk@56559 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/upload.php

@@ -144,7 +144,7 @@ if ( 'grid' === $mode ) {
 	// Remove the error parameter added by deprecation of wp-admin/media.php.
 	add_filter(
 		'removable_query_args',
-		function() {
+		function () {
 			return array( 'error' );
 		},
 		10,