Issue #2557253 by phenaproxima, neclimdul: MigrateFullDrupalTestBase test discovery gobbles all the memory

Issue #2552519 by andypost: Fix \Drupal\contact\ContactFormAccessControlHandler::checkAccess() visibility

Issue #2550823 by phenaproxima, neclimdul: Migrate Drupal integration tests should load all dump files

Issue #2533964 by edurenye, Berdir, Gábor Hojtsy: Langcode widget visibility settings from language.module are not applied consistently

Issue #2506581 by alexpott, Wim Leers, Fabianx, xjm, joelpittet, Cottser, dawehner: Remove SafeMarkup::set() from Renderer::doRender

Issue #2527406 by Gábor Hojtsy, Berdir: CommentForm::init() and MessageForm::init() are useless/broken

Issue #2512718 by Berdir, pfrenssen, Wim Leers, Fabianx, dawehner, catch, effulgentsia, plach, Gábor Hojtsy: EntityManager::getTranslationFromContext() should add the content language cache context to the entity

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 #2513396 by Cottser, larowlan, HelloNewman, webchick, crowdg, Bojhan, eliza411, ivanstegic, LewisNyman, lunk_rat, nickrosencrans, stpaultim: There is no link, anywhere, to a contact form once a user creates it

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

Issue #2511472 by Wim Leers, Fabianx, dawehner: Refactor all usages of drupal_render()/Renderer::render() that break #2450993

Issue #2456521 by pjonckiere, mpdonadio, jhodgdon, rteijeiro, David_Rothstein, xjm: Add DateFormatter::formatDiff() as a non-buggy alternative to DateFormatter::formatInterval() when the start and end of the interval are known

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

Issue #2322949 by plach, kgoel, Berdir, fgm, damiankloip, dawehner: Implement generic entity link view field handlers

Issue #2432791 by alexpott, vijaycs85, tim.plunkett, joshtaylor, Fabianx, Berdir, yched, bojanz: Skip Config::save schema validation of config data for trusted data.

Issue #2463009 by Wim Leers: Introduce CacheableResponseInterface: consolidate ways of setting X-Drupal-Cache-Tags/Contexts headers

Issue #2322195 by rpayanm, nlisgo, cilefen, balagan, LinL, akashjain132, filijonka, epari.siva, Tebro, Temoor, pcambra, unstatu, Poornima3, Shivam Agarwal, abhi170893, Dom., PieterJanPut, Mile23, JeroenT, disasm: Replace all instances of user_load(), user_load_multiple(), entity_load('user') and entity_load_multiple('user') with static method calls

Revert "Issue #2459753 follow-up by tim.plunkett, alexpott: EntityForm::validate() should be able to modify the form structure"

This reverts commit fb5ea78b.

Issue #2459753 follow-up by tim.plunkett, alexpott: EntityForm::validate() should be able to modify the form structure

Revert "Issue #2459753 by tim.plunkett: EntityForm::validate() should be able to modify the form structure"

This reverts commit d4d83576.

Issue #2454145 by kgoel, dawehner, adamwhite, rteijeiro, wwhurley: Replace user_name handler with Field API formatter

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

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

Issue #2459971 by Gábor Hojtsy: The langcode key on configuration files is not explicit in configuration schema

Issue #2457887 by prateekMehta, stefan.r, rpayanm, alexpott: Use Utility\SafeMarkup class instead of Utility\String for placeholder(), checkPlain(),format() functions

Issue #2428703 by Wim Leers: Add a 'user.permissions' cache context (was: "Should cache contexts be able to associate a cache tag?")

Issue #2090115 by alexpott, xjm: Don't install a module when its default configuration has unmet dependencies

Issue #2407765 by Wim Leers, borisson_: Wherever simple config is used to render output to end user, associate their cache tags