shortcut_set_title_callback() has been removed, and shortcut_set_title() no longer sanitizes its output

To preserve backwards compatibility within a stable release branch, the Drupal 7 version of the Shortcut module uses a deprecated shortcut_set_title_callback() function as the title callback for the "Edit shortcuts" menu item in hook_menu().

In Drupal 8, this function has been removed. Accordingly, the existing shortcut_set_title() function has been changed to no longer sanitize its output (so that it can be correctly used as a title callback function).

Any Drupal 7 code which directly called shortcut_set_title() expecting to receive sanitized output will need to be changed in Drupal 8. See the information about sanitization in Drupal 8.