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

Issue #3099789 by amateescu, Berdir, hchonov, catch, alexpott: Remove the BC layer for revision metadata keys

Issue #3001800 by Mile23, Berdir, amateescu, larowlan: Fix "The revision_user revision metadata key is not set." and friends

Issue #2936511 by hchonov, Berdir, plach, Wim Leers, catch, amateescu, sdewitt: ContentEntityType::getRevisionMetadataKeys() never considers the BC logic because of the new "revision_default" key

Issue #2891215 by plach, timmillwood, hchonov, amateescu, catch, gabesullice: Add a way to track whether a revision was default when originally created

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 #2248983 by hchonov, amateescu, paranojik, timmillwood, tstoeckler, catch, Berdir, alexpott: Define the revision metadata base fields in the entity annotation in order for the storage to create them only in the revision table

Issue #2716661 by anoopjohn: Fix 'Drupal.Commenting.FunctionComment' coding standard - Issues related to @see references

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

Issue #2382675 by plach, yched, alexpott: hook_entity_create() affects the data of new translations of existing entities in unexpected and undocumented ways

Revert "Issue #2382675 by plach, yched: ContentEntityBase::addTranslation() should not fire hook_entity_create()"

This reverts commit 58332b26.

Issue #2382675 by plach, yched: ContentEntityBase::addTranslation() should not fire hook_entity_create()

Issue #2204697 by alexpott, tstoeckler, mauzeh, Berdir: Move getConfigPrefix() to ConfigEntityTypeInterface

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

Issue #2269003 by damiankloip, Berdir: Fixed Unnecessary high memory usage in EntityType::getKeys().

Issue #2119905 by damiankloip, tim.plunkett, Berdir: Provide @ConfigEntityType and @ContentEntityType to have better defaults.