Index: src/wp-includes/formatting.php
===================================================================
--- src/wp-includes/formatting.php	(revision 42156)
+++ src/wp-includes/formatting.php	(working copy)
@@ -1914,10 +1914,11 @@
 }
 
 /**
- * Sanitizes a title, or returns a fallback title.
+ * Sanitizes a into a slug, which can be used in places such as URLs or HTML attributes.
  *
- * Specifically, HTML and PHP tags are stripped. Further actions can be added
- * via the plugin API. If $title is empty and $fallback_title is set, the latter
+ * In a save context, converts accents to ASCII characters. By default, output is
+ * further limited to alphanumeric characters, underscore (_) and dash (-) through the
+ * 'sanitize_title' filter. If $title is empty and $fallback_title is set, the latter
  * will be used.
  *
  * @since 1.0.0