Content Moderation Notifications: Email text field quietly truncates longer than 128 characters

Well, making the simple change

    $form['emails'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Adhoc email addresses'),

to

    $form['emails'] = [
      '#type' => 'textarea',
      '#title' => $this->t('Adhoc email addresses'),

seems to work just fine for storage, but it would be remiss of me to provide a patch without also updating the text field for help text and to handle expected combos of command and/or line breaks, and the module's existing Tests of getMail() to run it through the paces, and I won't get to that any time soon.

This handles both combos of commas and newlines (or linebreaks for that matter):

      // Adhoc emails.
      $adhoc_emails = array_map('trim', explode(',', $notification->getEmails()));

becomes

      // Adhoc emails.
      $adhoc_emails = array_map('trim', explode(',', preg_replace("/((\r?\n)|(\r\n?))/", ',', $notification->getEmails())));

Ok fine here's a patch as described in #2, sans tests. Would someone like to give this a go and also update the Tests to be account for this change?