Issue #2399219 by amateescu: Allow entity form handlers to determine the entity object they need to work with

Issue #2143729 by tstoeckler, plach, jsbalsera, Berdir, mauzeh, damiankloip, andypost: Entity definitions miss a language entity key

Issue #2113243 by rpayanm, Xano, tstoeckler: Rename BaseFormIdInterface::getBaseFormID() to BaseFormIdInterface::getBaseFormId()

Issue #2328919 by Mile23, YesCT, tim.plunkett: Remove () from a bunch of @covers definitions in PHPUnit

Issue #2340667 by YesCT, Pedro Lozano, alexpott, martin107: Protect Drupal\Core\Language\Language::id, and use getId().

Issue #2340123 by Wim Leers: Setting cache tags can be tricky: use strings instead of nested arrays to improve DX.

Issue #2333113 by effulgentsia, plach: Add an EntityDefinitionUpdateManager so that entity handlers can respond (e.g., by updating db schema) to code updates in a controlled way (e.g., from update.php).

Issue #2270323 by sun, dawehner, neclimdul: Remove DRUPAL_ROOT constant redefinitions from unit tests.

Issue #2240459 by Gábor Hojtsy, penyaskito | LoMo: Fixed Applying default language fallback rules to interface translation has impressively bad results.

Issue #2212427 by Mixologic, YesCT, Sutharsan, mgriego, icseh., visabhishek, znerol: Use interface instead of class name for language manager where appropriate.

Issue #1976158 by Berdir | msonnabaum: Rename entity storage/list/form/render "controllers" to handlers.

Issue #2283977 by alexpott, Gábor Hojtsy, effulgentsia, fago: Create a new ConfigEntity type for storing bundle-specific customizations of base fields.

Issue #2154435 by andypost, Berdir, mparker17: Rename EntityAccessController to EntityAccessControlHandler.

Issue #2269025 by penyaskito, andypost, grom358, Berdir, mikeegoulding, larowlan: Fixed CommentManager::getAllFields() should have a static cache.

Issue #697760 by sun: Replace getInfo() in tests with native phpDoc + annotations (following PHPUnit).

Issue #2246665 by jaredsmith, martin107, YesCT, filijonka, tstoeckler: Typehint with Drupal\Core\Language\LanguageInterface instead Drupal\Core\Language\Language.

Issue #2081153 by YesCT, lauriii, rdatar, miraj9093, Enxebre, smiro, alexpott: Remove unused local variables from core/tests.

Issue #2165475 by damiankloip, dawehner, martin107, tim.plunkett, jibran, xjm, Jalandhar: Provide a generic class resolver.

Issue #2178795 by tim.plunkett, jlbellido, YesCT, Berdir, Xano: Allow DiscoveryInterface::getDefinition() to throw an exception for an invalid plugin.

Issue #2039435 by Xano, Berdir | akshay.swnt22: Convert EntityManager to extend DefaultPluginManager.

Issue #2079797 by ParisLiakos, Xano, amateescu, tim.plunkett: Provide a trait for $this->t() and $this->formatPlural().

Issue #2228721 by amateescu, drunken monkey: TypedData doesn't support config entity types; flag errors if you try.

Issue #2226197 by fago, jessebeach: Introduce FieldStorageDefinitionInterface in the Entity Field API.

Issue #2120871 by andypost, Berdir, amateescu, vladan.me, Xano: Rename EntityListController to EntityListBuilder.