Index: src/wp-includes/pluggable.php
===================================================================
--- src/wp-includes/pluggable.php	(revision 26907)
+++ src/wp-includes/pluggable.php	(working copy)
@@ -1273,8 +1273,10 @@
 
 if ( !function_exists('wp_new_user_notification') ) :
 /**
- * Notify the blog admin of a new user, normally via email.
+ * Email login credentials to a newly-registered user.
  *
+ * A new user registration notification is also sent to admin email.
+ *
  * @since 2.0.0
  *
  * @param int $user_id User ID