Index: includes/form.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/form.inc,v
retrieving revision 1.265.2.34
diff -u -p -r1.265.2.34 form.inc
--- includes/form.inc	6 Aug 2010 11:02:49 -0000	1.265.2.34
+++ includes/form.inc	20 Oct 2010 14:26:35 -0000
@@ -62,7 +62,9 @@
  *   Any additional arguments are passed on to the functions called by
  *   drupal_get_form(), including the unique form constructor function.
  *   For example, the node_edit form requires that a node object be passed
- *   in here when it is called.
+ *   in here when it is called. These are available to implementations of
+ *   hook_form_alter() and hook_form_FORM_ID_alter() as the array
+ *   $form_state['build_info']['args'].
  * @return
  *   The rendered form.
  */