? profiles/testing
Index: modules/system/system.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.module,v
retrieving revision 1.946
diff -u -p -r1.946 system.module
--- modules/system/system.module	7 Jul 2010 17:56:42 -0000	1.946
+++ modules/system/system.module	14 Jul 2010 20:20:10 -0000
@@ -3566,13 +3566,20 @@ function system_date_format_type_delete(
 }
 
 /**
- * Save a date format to the database.
+ * Saves a date format to the database.
  *
  * @param $date_format
- *   An array of attributes for a date format.
+ *   A date format array containing following keys:
+ *   - type: A string containing the date type this format is associated with.
+ *   - format: A date format string.
+ *   - locked: A boolean indicating whether or not this format should be
+ *     configurable from the user interface.
  * @param $dfid
  *   If set, replace an existing date format with a new string using this
  *   identifier.
+ *
+ * @see system_get_date_types()
+ * @see http://php.net/date
  */
 function system_date_format_save($date_format, $dfid = 0) {
   $format = array();