Issue #2884223 by kiamlaluno, Dinesh18: In \Drupal\Core\State\State, parent::delete($key) is called twice

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

Issue #2834580 by Berdir: Move locale.translation_status state key to a separate key/value collection

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits