Issue #3375477 by longwave: Add BC for asset.query_string service to DbUpdateController::__construct

Issue #3358336 by kim.pepper, rpayanm, andypost, longwave, smustgrave, Wim Leers, catch: Deprecate _drupal_flush_css_js() and create a new AssetQueryString cache service

Issue #3182405 by jhodgdon, smustgrave, ranjith_kumar_k_u, dww: Do not use verb "Install" for things other than turning on modules/themes

Issue #3280398 by alexpott, mherchel, quietone: Theme's post updates within update.php refer to themes as "module"

Issue #3175287 by murilohp, quietone, SivaprasadC, ankithashetty, anmolgoyal74, sarvjeetsingh, xjm, longwave: Remove accidentally duplicated words in code comments

Issue #3222251 by bbrala, longwave: [November 8, 2021] Replace all isset constructs with the null coalescing operator

Issue #2473875 by znerol, alexpott, andypost, kim.pepper, amit.drupal, raman.b, martin107, joachim: Convert uses of $_SESSION to symfony session retrieved from the request

Issue #2875279 by Spokje, John Cook, jungle, voleger, mradcliffe, mrinalini9, jpatel657, quietone, jonathanshaw, alexpott, joachim, rajeshwari10, RajeevK, Yogesh Pawar, James.Shee, lcngeo, borisson_, time2buzzthetower, ccasals, kavo: Update core modules to use the new batch builder

Issue #2124069 by voleger, andypost, martin107, damiankloip, cburschka, dawehner, kim.pepper, daffie, pcambra, ParisLiakos, Xano, longwave, MerryHamster, vacho, kostyashupenko, catch, alexpott, amateescu, Mile23, claudiu.cristea, larowlan, almaudoh, Berdir, zviryatko: Convert schema.inc to the update.update_hook_registry service (UpdateHookRegistry)

Issue #2903911 by joshmiller, longwave, anmolgoyal74, ankithashetty, init90, Pooja Ganjage, _gradient_, daffie, borisson_: Fix 'Drupal.Commenting.FunctionComment.ParamMissingDefinition' coding standard

Issue #2824935 by idebr, mfernea, Deepak Goyal, pfrenssen, longwave, hgunicamp, jofitz, andypost, daffie: Fix Squiz.ControlStructures.SwitchDeclaration coding standard

Issue #2830326 by dww, mpdonadio, cebasqueira, Wim Leers, amateescu, jungle, xjm, daffie, Pasqualle: Broken link to 'Put your site into maintenance mode' on update.php results in WSOD

Issue #2917600 by tedbow, alexpott, catch, anthonyf, xjm, andypost, Alan D., moshe weitzman, Berdir: update_fix_compatibility() puts sites into unrecoverable state

Issue #3074585 by mikelutz, alexpott, Berdir, Mile23, heddn, effulgentsia, Wim Leers: [Symfony 5] Replace app.root and site.path string services with container parameters

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 #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 #665790 by chrisrockwell, Sumit kumar, lauriii, joelpittet, sun, vulcanr, vaplas, yoroy, leahtard, tompagabor, aspilicious, ckrina, Gábor Hojtsy, David_Rothstein, Manuel Garcia, rootwork, nod_, kostyashupenko, pguillard, Bojhan, droplet, typhonius, wturrell, mgifford, webkenny, cosmicdreams, tkoleary, YesCT, marcvangend, markabur, LewisNyman, mrfelton, oriol_e9g, prabhu9484, catch, hedrickbt, tsvenson, longwave, dww, kika, borisson_, rdellis87, realityloop, klonos: Redesign the status report page

Issue #2572777 by andypost, alexpott, attiks, andriyun: Fix 'Squiz.Strings.ConcatenationSpacing' coding standard

Issue #2701851 by amateescu, animaci: The 'system.db_update' route should restrict access via the 'access_check.db_update' service

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

Issue #2570355 by Sutharsan, stefan.r, kgoel, josephdpurcell, joelpittet, justAChris, dawehner, pfrenssen, pwolanin, David_Rothstein, catch: Replace remaining !placeholder and @placeholder with :placeholder for URLs

Issue #2538108 by dawehner, jhedstrom: Add hook_post_update_X() for data value updates to reliably run after data format updates

Issue #2558247 by dawehner, catch, mradcliffe, jhedstrom, Berdir, jibran, effulgentsia, webchick: Remove rebuildAll() and module install from UpdatePathTestBase

Issue #2542748 by plach, effulgentsia, jhedstrom, Gábor Hojtsy, alexpott, mpdonadio, catch, dawehner: Automatic entity updates can fail when there is existing content, leaving the site's schema in an unpredictable state

Issue #2538274 by pwolanin, Wim Leers, dawehner: DbUpdateController has broken mainteneance mode logic, and update.php doesn't run due to aggregated JS assets

Issue #2535082 by alexpott, jhedstrom, xjm, plach, Fabianx, effulgentsia, Berdir: Allow hook_update_N() implementations to run before the automated entity updates

Issue #2351015 by plach, effulgentsia, Wim Leers, dawehner, martin107, damiankloip, cilefen, Fabianx, catch, pwolanin, Damien Tournoud, znerol, YesCT, larowlan: URL generation does not bubble cache contexts

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

Issue #2074297 by pwolanin, hussainweb, larowlan: Optimize the code in doGenerate() in the UrlGenerator to take advantage of Drupal path restrictions.

Issue #2364157 by mpdonadio, dawehner, martin107, Berdir, pcambra, naveenvalecha, tim.plunkett: Replace most existing _url calls with Url objects

Issue #2328111 by dawehner, martin107, neclimdul: Replace most instances of the DRUPAL_ROOT constant with the app.root container parameter.