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

Issue #2503379 by Mac_Weber, DuaelFr, lluvigne, naveenvalecha, jmolivas: Replace deprecated usage of entity_create('filter_format') with a direct call to FilterFormat::create()

Issue #2481453 by dawehner, pwolanin, rteijeiro, neclimdul, znerol: Implement query parameter based content negotiation as alternative to extensions

Issue #2385225 by tibbsa: Clean-up editor module test members - ensure property definition and use of camelCase naming convention

Issue #2063303 by dawehner, damiankloip, Wim Leers: Fixed A Drupal 8 AjaxResponse that must return a 403, returns a 403 and prints 'A fatal error occurred: '

Issue #697760 by sun: Replace getInfo() in tests with native phpDoc + annotations (following PHPUnit).

Issue #2208609 by sun, Jalandhar, damiankloip: Move Json utility class into Drupal\Component\Serialization.

Issue #2093173 by longwave, Cyberschorsch, forbesgraham, sandipmkhairnar, damiankloip, rbayliss, grom358, harijari, InternetDevels, dawehner: Remove all calls to drupal_json_decode(), use \Drupal\Component\Utility\Json::decode().

Issue #2074037 by Wim Leers, effulgentsia: Add drupalPostUrl() — drupalPost()/drupalPostAjax() are for forms only, D8 JS performs non-form HTTP requests.

Issue #2031385 by Wim Leers, Thomas Brekelmans: Fixed Editor's in-place editing AJAX endpoint broken because of #1043198 and routing system bug.