Issue #2451363 by alexpott, Berdir, pjcdawkins: Ensure install_profile is exists in settings.php after installation

Issue #2460847 by alexpott: Allow optional configuration to be installed when its dependencies are met

Issue #2463029 by Wim Leers: EntityFormDisplay should update $form with cache tags of FieldConfig, FieldStorageConfig, EntityFormDisplay config entities

Issue #2389455 by hussainweb, AjitS, Mile23, subhojit777, tibbsa, Ayesh: Clean-up system module test members - ensure property definition and use of camelCase naming convention

Issue #2392221 by joegraduate, er.pushpinderrana, zealfire, ClientGuy: install_run_task() and install_tasks() don't document the task structure

Issue #2460823 by jhodgdon: Document that locale + config translation integration treats string uniqueness the same way as locale itself

Issue #2428399 by SkidNCrashwell, Sagar Ramgade: Default empty option label text different in documentation

Issue #2453341 by Wim Leers: Contact forms don't have necessary cache contexts & tags; flood control should work on validate, not on view

Issue #2456691 by YesCT, andypost, dawehner, rteijeiro: User email field need to use Field-Entity-aware formatters in Views

Issue #2463821 by alexpott: Fix Drupal\Core\Config\ConfigManagerInterface::diff return documentation

Issue #2461097 by Wim Leers: Make TwigThemeTestController:::registryLoaderRender()'s response uncacheable

Issue #2392669 by hussainweb, Mile23, rteijeiro, subhojit777, AjitS: Clean-up field module test members - ensure property definition and use of camelCase naming convention

Issue #2453311 by David_Rothstein, TravisCarden, Dom., rpayanm: Issue #2417983 follow-up: a few more "the the"s

Issue #2461087 by Wim Leers, dawehner: Add 'no_cache' route option to mark a route's responses as uncacheable (was: Cron run response should not be cacheable)

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

Issue #2388255 by dawehner, hussainweb, pwolanin: Limit PDO MySQL to executing single statements if PHP supports it

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