Issue #2572613 by Malevi4, idebr, pfrenssen, Mile23, RajeevK: Fix 'Drupal.Array.Array.CommaLastItem' coding standard

Issue #2935256 by Jo Fitzgerald, voleger, kim.pepper, ibustos, Yogesh Pawar, catch, jibran: Remove all usages of drupal_get_message and drupal_set_message in modules

Issue #2950709 by idebr, Grimreaper: ConfigSync.php tries to include non-existing file config.admin.inc

Issue #2873696 by nvexler, wengerk, gido, Jo Fitzgerald, xjm: Add @internal to core classes, methods, properties to Form Classes

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 #2719695 by alexpott, Mile23: Fix 'Drupal.Classes.ClassDeclaration.CloseBraceAfterBody' coding standard

Issue #2572693 by Mile23, andriyun, andypost, attiks: Fix 'Drupal.ControlStructures.ControlSignature' coding standard

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

Issue #2351919 by almaudoh, Wim Leers, claudiu.cristea: Replace uses of drupal_get_path() with __DIR__  or Extension::getPath() where possible

Issue #2487588 by YesCT, Leksat, Schnitzel, alexpott, anavarre, xjm: Move CMI import/export directory "staging" to "sync", as it is confused with staging environments

Issue #2564353 by alexpott, joelpittet, xjm, justAChris, nlisgo, subhojit777: Remove !placeholder usage from SafeMarkup::format()

Issue #2511472 by Wim Leers, Fabianx, dawehner: Refactor all usages of drupal_render()/Renderer::render() that break #2450993

Issue #2486475 by Eli-T, alexpott, xjm: Notifying user of config changes when config has never been synched still makes no sense

Issue #2416109 by alexpott, bircher, xjm, dawehner: Validate configuration dependencies before importing configuration

Issue #2472323 by dawehner, neclimdul, Crell, kim.pepper, nod_, Wim Leers, larowlan, jibran, pwolanin, catch: Move modal / dialog to query parameters

Issue #2388867 by alexpott, xjm, jhodgdon: Notifying user of config changes when config has never been synched makes no sense

Issue #2309737 by rpayanm, hussainweb, max-kuzomko, herom, millerbennett, ianthomas_uk, quietone, Sutharsan, sumitmadan, toddmbloom: Remove deprecated format_plural usage

Issue #2324055 by dawehner, cilefen, znerol: Split up the module manager into runtime information and extension information

Issue #2205527 by cilefen, alexpott, martin107, Xen, Gaelan, clintrandall777@gmail.com: Fixed Move configuration import lock to lock.persistent service since a lock can not exist beyond a single request.

Issue #2347465 by tim.plunkett, dawehner, cilefen: Convert all instances of #type link/links to convert to use routes.

Issue #2148199 by cilefen, pwolanin, attila.fekete, mtift | alexpott: Use snapshot to warn users if the configuration has changed since last import.

Revert "Issue #2148199 by cilefen, attila.fekete, mtift | alexpott: Use snapshot to warn users if the configuration has changed since last import."

This reverts commit fcc5b623.

Issue #2336353 by cilefen: Fixed The message when there is no configuration to synchronize/import is misleading.

Issue #2148199 by cilefen, attila.fekete, mtift | alexpott: Use snapshot to warn users if the configuration has changed since last import.

Issue #2335659 by tim.plunkett, dawehner, effulgentsia, sun: Remove FormState ArrayAccess usage from core.

Issue #2271251 by ParisLiakos, undertext, JeroenT, StevenPatz, tim.plunkett: Remove usages of watchdog() from non-form and non-controllers.

Issue #2271967 by Jose Reyero, alexpott, amitgoyal: Fixed and use TypedConfigManagerInterface/TypedConfigManager.

Issue #1289536 by ParisLiakos, RobLoach, Crell, larowlan, fgm, pounard, Pancho, dawehner, scor, tim.plunkett, alexpott, socketwench: Switch Watchdog to a PSR-3 logging framework.

Revert "Issue #1289536 by RobLoach, Crell, Pancho, pounard, socketwench, fgm, dawehner, scor, tim.plunkett, larowlan, ParisLiakos: Switch Watchdog to a PSR-3 logging framework."

This reverts commit ef250ba2.