Documentation problem with node_example_validate

This may have already been fixed... The example modules are now being maintained in a separate project, and unforunately, the most up-to-date ones are not on api.drupal.org yet. Sigh.

I don't see the problem here.

Here is the current node_example_validate():

/**
 * Implementation of hook_validate().
 *
 * Our "quantity" field requires a number to be entered. This hook lets
 * us ensure that the user entered an appropriate value before we try
 * inserting anything into the database.
 *
 * Errors should be signaled with form_set_error().
 */
function node_example_validate($node) {
  if ($node->quantity) {
    if (!is_numeric($node->quantity)) {
      form_set_error('quantity', t('The quantity must be a number.'));
    }
  }
}