Verified the patch 'mini_2849100-38.patch' in #38 on Drupal 8.4.x site, below...

Verified the patch 'mini_2849100-38.patch' in #38 on Drupal 8.4.x site, below are the observations
1.Before applying the patch space was displayed before comma on Publising options
2.After applying patch 'mini_2849100-38.patch' on Drupal 8.4.x, the patch applied smoothly and the space before comma at Publishing options is removed. Attaching snapshot beforepatch.png and afterpatch.png for reference.

This can be marked as RTBC.