Index: includes/database.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/database.inc,v
retrieving revision 1.60
diff -u -p -r1.60 database.inc
--- includes/database.inc	23 Oct 2006 18:38:44 -0000	1.60
+++ includes/database.inc	11 Dec 2006 09:32:48 -0000
@@ -159,6 +159,9 @@ function _db_query_callback($match, $ini
   }
 }
 
+/**
+ * Indicates the place holders that should be replaced in _db_query_callback().
+ */
 define('DB_QUERY_REGEXP', '/(%d|%s|%%|%f|%b)/');
 
 /**