Issue #2940038 by Sweetchuck, drunken monkey, rajeshwari10, borisson_: Use $this in @return PhpDoc comments instead of the name of the current class or interface

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

Issue #1392754 by tss, justAChris, jhodgdon: Comply with new documentation standards for @file for namespaced class files

Issue #2407195 by Wim Leers, Fabianx, joelpittet, lauriii, Crell: Move attachment processing to services and per-type response subclasses

Issue #2483433 by damiankloip, Wim Leers, catch, dawehner: Optimize CacheableMetadata::merge() + BubbleableMetadata::merge()

Issue #2491155 by mikeburrelljr, Mac_Weber, opdavies: Update drupal.org and kernel.org URLs in core modules (Follow-up to 2489912)

Issue #1897058 by disasm, rteijeiro: Replace "boolean" with "bool" when used as param/return/var type

Issue #2339491 by corbacho, dawehner, larowlan, effulgentsia, webflo: Ajax requests on forms with files fail on IE 9

Issue #2347469 by mondrake, Wim Leers, larowlan, kattekrab, mnico, tadityar: Rendering forms in AjaxResponses does not attach assets automatically

Issue #784626 by Wim Leers, Manuel Garcia, jcisio, joelpittet, Bevan, fcaspani, dcmouyard: Default all JS to the footer, allow asset libraries to force their JS to the header

Issue #2368797 by Wim Leers, dawehner, rteijeiro: Optimize ajaxPageState to keep Drupal 8 sites fast on high-latency networks, prevent CSS/JS aggregation from taking down sites and use HTTP GET for AJAX requests

Issue #2045927 by herom, martin107, ianthomas_uk, Xano, michaellander, Sutharsan: Replace all drupal_alter() deprecated function calls.

Issue #2168113 by penyaskito, jessebeach, catch: Add leading underscore and other discouragement to drupal_add_css() and drupal_add_js().

Issue #1998638 by damiankloip, dawehner, kim.pepper, cosmicdreams, alexpott, larowlan, Damien Tournoud: Replace almost all remaining superglobals (, , etc.) with Symfony Request object.

Issue #1998638 by damiankloip, dawehner, kim.pepper, cosmicdreams, larowlan, Damien Tournoud: Replace all remaining superglobals (, , etc.) with Symfony Request object.

Issue #2004086 by dawehner, pwolanin, katbailey, tim.plunkett, vijaycs85, fabpot: The Request service must be synthetic.

Issue #2049207 by dlu, blakehall, janstoeckler, ramlev, Moderate | Cottser: Replace .tpl.php with .html.twig in documentation.

Issue #1793648 by nod_, kmox83, droplet, rteijeiro: Follow-up: replace all occurence of Drupal.settings with drupalSettings.

Issue #1941288 by larowlan, effulgentsia, dawehner, nod_: Fixed Regression: ajaxPageState not being updated with AjaxResponse, assets (js/css) being added twice.

Issue #1848880 by Wim Leers, effulgentsia: Test order of AJAX commands: add Ajax\FrameworkTest::testOrder(), strengthen testLazyLoad(), fix JS settings not being prepended.

Issue #1865926 by damiankloip: Don't need to call parent::setData() in AjaxResponse::prepare() method.

Issue #1875632 follow-up by nod_, Wim Leers, effulgentsia: Added wrapper function for JS settings merging behavior, fix tabledrag.

Issue #1356170 by ohnobinki, tim.plunkett: Remove all uses of array_merge_recursive(), or document why they are being used instead of NestedArray::mergeDeep().

Issue #1812866 follow-up by mkadin, effulgentsia, Wim Leers: Fixed Rebuild the server side AJAX API.