Coding Standards: Always use parentheses when instantiating an object.

Note: This will be enforced by WPCS 3.0.0.

Props jrf.
See #56791.

git-svn-id: https://develop.svn.wordpress.org/trunk@54891 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/user.php

@@ -29,7 +29,7 @@ function add_user() {
  */
 function edit_user( $user_id = 0 ) {
 	$wp_roles = wp_roles();
-	$user     = new stdClass;
+	$user     = new stdClass();
 	$user_id  = (int) $user_id;
 	if ( $user_id ) {
 		$update           = true;