Issue #2978922 by brathbone, philipnorton42, msankhala, hardikpandya, alexpott, siliconmeadow: Improve batch_process() documentation

(cherry picked from commit 34b94c8)

Author: Nathaniel Catchpole

includes/form.inc

@@ -779,18 +779,18 @@ function batch_set($batch_definition) {
  * Form API takes care of batches that were set during form submission.
  *
  * @param \Drupal\Core\Url|string $redirect
- *   (optional) Either path or Url object to redirect to when the batch has
- *   finished processing. Note that to simply force a batch to (conditionally)
- *   redirect to a custom location after it is finished processing but to
- *   otherwise allow the standard form API batch handling to occur, it is not
- *   necessary to call batch_process() and use this parameter. Instead, make
- *   the batch 'finished' callback return an instance of
- *   \Symfony\Component\HttpFoundation\RedirectResponse, which will be used
+ *   (optional) Either a path or Url object to redirect to when the batch has
+ *   finished processing. For example, to redirect users to the home page, use
+ *   '<front>'. If you wish to allow standard form API batch handling to occur
+ *   and force the user to be redirected to a custom location after the batch
+ *   has finished processing, you do not need to use batch_process() and this
+ *   parameter. Instead, make the batch 'finished' callback return an instance
+ *   of \Symfony\Component\HttpFoundation\RedirectResponse, which will be used
  *   automatically by the standard batch processing pipeline (and which takes
- *   precedence over this parameter).
- *   User will be redirected to the page that started the batch if this argument
- *   is omitted and no redirect response was returned by the 'finished'
- *   callback. Any query arguments will be automatically persisted.
+ *   precedence over this parameter). If this parameter is omitted and no
+ *   redirect response was returned by the 'finished' callback, the user will
+ *   be redirected to the page that started the batch. Any query arguments will
+ *   be automatically persisted.
  * @param \Drupal\Core\Url $url
  *   (optional) URL of the batch processing page. Should only be used for
  *   separate scripts like update.php.