Issue #2780475 by alexpott, Jo Fitzgerald, mpdonadio, dawehner: assertEscaped() and assertUnescaped don't work as you would expect in JavascriptTestBase

Issue #3067584 by idebr, mondrake, Niklan, andypost, catch, alexpott: Pager template renders attributes that do not exist

Issue #2912237 by karthikkumarbodu, smagdits, gawaksh, init90, karimei, vacho, andypost, shubham.prakash, mmbk, cilefen, tatarbj, borisson_, Lendude: Remove calls to deprecated method assertEqual from Config tests

Revert "Issue #3067584 by idebr, Niklan, andypost: Pager template renders attributes that do not exist"

This reverts commit 087e020d.

Revert "Issue #3055443 by alexpott, amateescu, catch, Berdir, chr.fritsch: Switch to a memory backend for running the database updates"

This reverts commit c22202ec.

Issue #3068858 by alexpott, Berdir: Properly deprecate \Drupal\Core\Entity\EntityTypeRepositoryInterface::clearCachedDefinitions

Issue #2818677 by msankhala, NickWilde, Berdir, alexpott, dimaro, poornima.n, sidharthap, dhirendra.mishra, keshav.k, xjm, mahtab_alam, ieguskiza, borisson_, catch, larowlan: Replace usages of deprecated method drupal_render_root()

Issue follow-up #3002933 by alexpott: Fix "The Drupal\editor\Plugin\EditorBase::settingsFormSubmit method is deprecated since version 8.3.x and will be removed in 9.0.0." and friends

Issue #2924781 by osman, yogeshmpawar, zaporylie, mfernea: Missing @var annotation for scalars that do not provide default values

Issue #3065474 by tim.plunkett, jeremyr, omkar06: An error occurs when viewing an entity after removing all layout sections and Quickedit module enabled

Issue #3065261 by gabesullice, Wim Leers: Add a local task for JSON:API's settings page so other modules can add their own tasks

Issue #2959282 by alexpott, jibran, Mile23: Fix "Install profile will be a mandatory parameter in Drupal 9.0." deprecation

Issue #3067761 by Berdir, alexpott: Resolve "The numeric plugin for watchdog.wid field is deprecated" deprecation message

This reverts commit 435de03b.

Issue #3018287 by ndobromirov, Wim Leers, gabesullice, e0ipso: ResourceTypeRepository computes ResourceType value objects on *every request*

Issue #3065591 by Charlie ChX Negyesi, amateescu: Add a useful example to TranslatableInterface::addTranslation

Issue #1476782 by daffie, droplet, donquixote, Katiemouse, Lendude, lnunesbr, ekl1773, init90, jhedstrom, catch, clemens.tolboom, amateescu: DatabaseStatementPrefetch::current PHP function array_unshift() are used incorrectly

Issue #3066637 by init90, fgm, ndobromirov: Avoid repeated work in NodeGrantDatabaseStorage::alterQuery

Issue #3055443 by alexpott, amateescu, catch, Berdir, chr.fritsch: Switch to a memory backend for running the database updates

Issue #2978261 by Berdir, msankhala, Wim Leers, roderik: \Drupal\Tests\system\Functional\Cache\AssertPageCacheContextsAndTagsTrait::assertCacheContexts() is unhelpful after conversion to phpunit

Issue #3066539 by shubham.prakash, Ujin, jhodgdon: Docs for search_index_clear $sid parameter are incorrect

Issue #3068067 by alexpott: Properly deprecate language_negotiation_url_prefixes() and language_negotiation_url_domains()

Issue #3068089 by alexpott, mikelutz: Properly deprecate \Drupal\migrate\Plugin\MigrateIdMapInterface::lookupDestinationId()

Issue #3002933 by alexpott, Mile23, Wim Leers: Fix "The Drupal\editor\Plugin\EditorBase::settingsFormSubmit method is deprecated since version 8.3.x and will be removed in 9.0.0." and friends