Issue #2625138 by Oleksiy, almaudoh: EntityRepository::loadEntityByUuid() implementation does not match EntityRepositoryInterface::loadEntityByUuid() @return documentation

Issue #2606058 by MattA, priya.chat, alexpott: Documentation for the ConfigEntityType annotation class does not reference the correct entity class

Issue #2614604 by rakesh.gectcr, dawehner: PHPdoc is missing for an overridden function in class ConditionManager

Issue #2605726 by edxxu, rakesh.gectcr: Wrong @return doc for \Drupal\Core\DrupalKernel::getModuleFileNames()

Issue #2564577 by snehi, borisson_, Wim Leers, r_sharma08, lauriii: Improve comments on PlaceholderGeneratorInterface::shouldAutomaticallyPlaceholder() and DynamicPageCacheSubscriber::shouldCacheResponse()

(cherry picked from commit df41f701)

(cherry picked from commit 71a15feb)

Issue #2612618 by anil280988, r_sharma08, Cottser, davidhernandez, kaushalkishorejaiswal: Add README.txt file to Stable explain its role as a backwards compatibility layer

Issue #2607332 by r_sharma08, ashhishhh, snehi, pjonckiere, dawehner: Missing @return tag in getActiveHelp(), denormalize(), createBookNode()

Issue #2628702 by zerolab, joachim: hook_entity_extra_field_info() @return references non-existent method

(cherry picked from commit 7960cbc4)

(cherry picked from commit a983f7cd)

Issue #2105583 by neclimdul, tim.plunkett, dawehner, Mile23: Add some sane strictness to phpunit tests to catch risky tests

(cherry picked from commit e746bd96)

Issue #2623790 by roderik, priya.chat, stefan.r: Update SessionManager::migrateStoredSession() method comment

Issue #2606344 by rakesh.gectcr, aneeshthankachan, dawehner, cilefen: Wrong @param doc for construct function in class CoreServiceProvider

Issue #2604018 by heykarthikwithu, snehi, kaushalkishorejaiswal, pjonckiere: Add @param documentation in __construct() of User module

(cherry picked from commit aaabb05c)

(cherry picked from commit 0fb0add6)

(cherry picked from commit 671200881f95bb8b82572aeafc4428e7d9ec5e30)

Issue #2603818 by jhodgdon, beejeebus, blackra: Add defgroups for listing page headers for api.drupal.org

Issue #2616498 by neclimdul, dawehner, Mixologic: Drupal\Core\Routing\RouteProvider::getCandidateOutlines() does an illegal shift when config is empty

(cherry picked from commit d9a92c36)

Issue #2625216 by alexpott: LocaleConfigManager::getTranslatableDefaultConfig() reads config from uninstalled modules

(cherry picked from commit 3693ba75)

Issue #2621782 by amateescu: SQL::addWhere not defaulting to "IN" operator when using EntityReferenceView for multiple values

(cherry picked from commit 7e80e5b8)

Issue #2572695 by marvin_B8, attiks, pfrenssen, xjm: Fix 'Drupal.ControlStructures.ElseIf' coding standard

(cherry picked from commit f730e579)

This reverts commit 7dbb74b8.

Revert "Issue #2623232 by xjm, plach, benjy, penyaskito: Improve messages when entity/field mismatch happens"

This reverts commit 796fe6bc.

Revert "Issue #2571521 by Maouna, dawehner, sdstyles: Make the logger available on the controllerBase"

This reverts commit 63803570.