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

Issue #2529892 by larowlan, stefan.r, Berdir, almaudoh: BlockContentForm uses form validation instead of a validation Constraint

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

Issue #2455125 by mpdonadio, rteijeiro, jhodgdon, dawehner: Update EntityViewsData use of generic timestamp to use Field API formatter

Issue #2533994 by phenaproxima: Move module-specific migration support into the block_content module

Issue #2471232 by borisson_, JeroenT, sorressean, rbmboogie, ruha, mariancalinro: Optimize Cache::merge*(), by only accepting 2 instead of N arguments

Issue #2493033 by Berdir, Wim Leers, lauriii, Fabianx, effulgentsia, dawehner, catch, msonnabaum, Crell, webchick: Make 'user.permissions' a required cache context

Issue #2506195 by alexpott, joelpittet, xjm, David_Rothstein, Fabianx, pwolanin: Remove SafeMarkup::set() from Xss::filter()

Issue #2512456 by tim.plunkett, legolasbo, MattA, dawehner, googletorp, darol100, Bojhan, webchick, andypost, ivanstegic, larowlan, lauriii, LewisNyman, tkoleary, rickvug, eliza411, lunk_rat, nickrosencrans, stpaultim, Mark LaCroix: Implement the new block layout design to emphasize the primary interaction of placing a block

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 #2478459 by plach, mkalkbrenner, chx, yched, Berdir, dawehner, benjy: FieldItemInterface methods are only invoked for SQL storage and are inconsistent with hooks

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 #1314214 by stefan.r, phayes, ergophobe, YesCT, damienwhaley, kbasarab, Tor Arne Thune, basic, pfrenssen, yannickoo, simolokid, fietserwin, bzrudi71: MySQL driver does not support full UTF-8 (emojis, asian symbols, mathematical symbols)

Revert "Issue #1314214 by stefan.r, phayes, ergophobe, YesCT, damienwhaley, Tor Arne Thune, kbasarab, pfrenssen, basic, yannickoo, simolokid: MySQL driver does not support full UTF-8 (emojis, asian symbols, mathematical symbols)"

This reverts commit b105158a.

Issue #1314214 by stefan.r, phayes, ergophobe, YesCT, damienwhaley, Tor Arne Thune, kbasarab, pfrenssen, basic, yannickoo, simolokid: MySQL driver does not support full UTF-8 (emojis, asian symbols, mathematical symbols)

Issue #2383871 by mgifford, rpayanm, a_thakur, maximpodorov, AohRveTPV, jhodgdon: Spellchecking Drupal - PHP

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

Issue #2428795 by mkalkbrenner, plach, yched, catch, hchonov, webchick, tstoeckler, pjonckiere, miro_dietiker, Schnitzel, klausi: Translatable entity 'changed' timestamps are not working at all

Issue #2375589 by larowlan, pameeela, jibran, kim.pepper, Wim Leers, Bojhan: Convert custom block library page to views

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 #2099137 by Wim Leers, amateescu, rteijeiro, larowlan, effulgentsia: Entity/field access and node grants not taken into account with core cache contexts

Issue #2375689 by Arla, Wim Leers, dawehner, tim.plunkett, Berdir: BlockBase::blockAccess() should return AccessResult instead of a bool

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 #2463417 by rpayanm, cilefen, hussainweb: Clean-up remaining test members in module tests - ensure property definition and use of camelCase naming convention

Issue #2453059 by Wim Leers: Set default render cache contexts: 'theme' + 'languages:' . LanguageInterface::TYPE_INTERFACE

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