Add a missing @since version to a function introduced in [32541].

DrewAPicture · DrewAPicture · commit 366d1843f056 · 2015-05-22T17:37:23.000Z
See #32444. git-svn-id: https://develop.svn.wordpress.org/trunk@32548 602fd350-edb4-49c9-b593-d223f7449a82
diff --git a/src/wp-includes/capabilities.php b/src/wp-includes/capabilities.php
@@ -1474,10 +1474,13 @@ function user_can( $user, $capability ) {
 }
 
 /**
- * Retrieve the global WP_Roles instance, instantiate if necessary
+ * Retrieve the global WP_Roles instance, instantiate if necessary.
  *
- * @global WP_Roles $wp_roles
- * @return WP_Roles global instance
+ * @since 4.3.0
+ *
+ * @global WP_Roles $wp_roles WP_Roles global instance.
+ *
+ * @return WP_Roles WP_Roles global instance if not already instantiated.
  */
 function wp_roles() {
 	global $wp_roles;
