Issue #2281533 by claudiu.cristea, amateescu, tim.plunkett, yched, jibran, catch: Entity Reference default selection plugin ignores matches if an entity type has no label key

Issue #2579021 by Wim Leers, Berdir, sasanikolic, Fabianx: Prevent comment forms from marking rendered nodes as uncacheable

Issue #2576533 by alexpott, stefan.r, Wim Leers, dawehner, xjm, effulgentsia, catch: Rename SafeStringInterface to MarkupInterface and move related classes

Issue #2172843 by fgm, marthinal, pfrenssen, amateescu, andypost, Wim Leers, stefan.r, pwieck, deepak_123: Remove ability to update entity bundle machine names

Issue #2569069 by stefan.r, mr.baileys, alexpott, lauriii: Replace TranslationWrapper with TranslatableString and deprecate TranslationWrapper

Issue #2560851 by alexpott, Xano: Deprecate EntityListBuilder::getLabel() and remove usages of SafeMarkup::checkPlain()

Issue #2559605 by Cottser, stefan.r: Convert SafeMarkup::checkPlain() in render arrays to #plain_text

Issue #2558905 by dawehner, pwolanin, cilefen, plach, willzyx: Content translation module - Information disclosure by insufficient access checking

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 #2551429 by Wim Leers, stefan.r, jibran, larowlan: FieldUI should accommodate route options in RouteSubscriber

Issue #2507967 by tim.plunkett: \Drupal\Core\Entity\Controller\EntityViewController::buildTitle() assumes the  is in the render array

Issue #2512866 by lauriii, Berdir, Wim Leers, Fabianx, effulgentsia, catch, dawehner: CacheContextsManager::optimizeTokens() optimizes ['user', 'user.permissions'] to ['user'] without adding cache tags to invalidate that when the user's roles are modified

Issue #2453175 by tim.plunkett, plach, rteijeiro, effulgentsia, eshta, dawehner, fago, Berdir, alexpott: Remove EntityFormInterface::validate() and stop using button-level validation by default in entity forms

Issue #2478459 by plach, mkalkbrenner, chx, yched, Berdir, dawehner, benjy: FieldItemInterface methods are only invoked for SQL storage and are inconsistent with hooks

Issue #2443323 by Wim Leers, Nitesh Sethia, yched, Fabianx, jhodgdon: New convention: CacheContextInterface implementations should mention their ID in their class-level docblock

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

Issue #1314214 by stefan.r, phayes, ergophobe, YesCT, damienwhaley, kbasarab, Tor Arne Thune, basic, pfrenssen, yannickoo, simolokid, fietserwin, bzrudi71: MySQL driver does not support full UTF-8 (emojis, asian symbols, mathematical symbols)

Issue #2483781 by borisson_, rbayliss, cilefen, mitalimehta, joshi.rohit100: Move cache contexts classes from \Drupal\Core\Cache to \Drupal\Core\Cache\Context

Issue #2195083 by Les Lim, ParisLiakos, Xano, gaurav_varshney, ravi.khetri, fago, jain_deepak: Add a dedicated @Constraint annotation class

Issue #2381277 by dawehner, plach, damiankloip, alexpott, olli, fgm, Wim Leers, Fabianx: Make Views use render caching and remove Views' own "output caching"

Issue #2395831 by dawehner, fago, martin107, cafuego, YesCT, plach, jibran, larowlan, Wim Leers, effulgentsia, klausi: Entity forms skip validation of fields that are not in the EntityFormDisplay

Revert "Issue #1314214 by stefan.r, phayes, ergophobe, YesCT, damienwhaley, Tor Arne Thune, kbasarab, pfrenssen, basic, yannickoo, simolokid: MySQL driver does not support full UTF-8 (emojis, asian symbols, mathematical symbols)"

This reverts commit b105158a.

Issue #1314214 by stefan.r, phayes, ergophobe, YesCT, damienwhaley, Tor Arne Thune, kbasarab, pfrenssen, basic, yannickoo, simolokid: MySQL driver does not support full UTF-8 (emojis, asian symbols, mathematical symbols)

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

Issue #2428795 by mkalkbrenner, plach, yched, catch, hchonov, webchick, tstoeckler, pjonckiere, miro_dietiker, Schnitzel, klausi: Translatable entity 'changed' timestamps are not working at all

Issue #2105797 by dawehner, fago, larowlan, effulgentsia, jibran, amateescu, yched: Add CompositeConstraintBase so that constraints involving multiple fields, such as CommentNameConstraint, can be discovered

Issue #1867518 by plach, dawehner, yched, iMiksu, epari.siva, marcvangend, Fabianx, Wim Leers, effulgentsia: Leverage entityDisplay to provide fast rendering for fields

Issue #2472669 by keopx, rpayanm, rteijeiro, jhodgdon: Complete documentation for every implementation of hook_ENTITY_TYPE_*

Issue #2456599 by k4v, dawehner, larowlan, rteijeiro, cutesquirrel, yched, jhodgdon: Field node_field_revision.title needs to use an entity-aware formatter in Views

Issue #2079427 by Berdir, andypost, yched: Core/Entity depends on classes / functions from field.module

Issue #2444231 by Wim Leers, nlisgo: Fix CacheableInterface so it makes sense (was: "Make Config objects & Entities implement CacheableInterface + add BubbleableMetadata::createFromCacheableObject()")

Issue #2418119 by Berdir, jhedstrom, larowlan, martin107, nlisgo, klausi, fago, Gábor Hojtsy: REST user updates bypass tightened user account change validation