Issue #2002134 by fago, yched, amateescu, effulgentsia: Move TypedData metadata introspection from data objects to definition objects.

Issue #2045927 by herom, martin107, ianthomas_uk, Xano, michaellander, Sutharsan: Replace all drupal_alter() deprecated function calls.

Issue #1919338 by catch, swentel, bblake, EllaTheHarpy, Cottser: Select widget (from the options module) prone to double encoding.

Issue #2151093 by Cottser, quietone, joelpittet, InternetDevels: Convert theme_admin_block_content() to Twig.

Issue #2191897 by damiankloip: Unit test the Drupal\serialization\Normalizer\EntityNormalizer class.

Issue #2200821 by yched, plopesc, Berdir, claudiu.cristea, swentel: Rename Fieldinterface and FieldInstanceInterface.

Issue #1996238 by sun, nod_, damiankloip, Wim Leers, longwave, alexpott, Xano, mdrummond, Mark Carver, Jeff Burnz, highrockmedia, joelpittet, et al: Replace hook_library_info() by *.libraries.yml file.

Issue #2177469 by Gábor Hojtsy, Aron Novak, swentel, andypost, Berdir: Move node base widgets to the top level of the form.

Issue #2198343 by damiankloip, longwave: Convert all usages of cache() and cache_invalidate_tags() procedural functions.

Issue #2006606 by plach, vijaycs85, Gábor Hojtsy, dawehner, YesCT, pfrenssen: Views rendering ignores entity language, eg: Identical nodes rendered in views when nodes have translations.

Issue #2187735 by ianthomas_uk, Sutharsan, andypost: Add removal information to docblock of all @deprecated functions.

Issue #2196907 by divesh.kumar: Convert all calls & docs references to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in link module.

Issue #2196901 by divesh.kumar, longwave: Convert all calls & docs references to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in language module.

Issue #2196897 by divesh.kumar: Convert all calls & docs references to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in image module.

Issue #2196895 by divesh.kumar: Convert all calls & docs references to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in forum module.

Issue #2196831 by kirby14: Convert all calls & docs references to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in edit module.

Issue #2196825 by kirby14: Convert all calls & docs references to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in content_translation module.

Issue #2196821 by JiriK: Convert all calls & docs references to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in contact module.

Issue #2196815 by kirby14: Convert all calls & docs references to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in color module.

Issue #2196811 by JiriK: Convert all calls to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in book module.

Issue #2196805 by divesh.kumar: Convert all calls to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in ban module.

Issue #2196801 by divesh.kumar: Convert all calls to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in aggregator module.

Issue #2196797 by divesh.kumar: Convert all calls to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in action module.

Issue #2196807 by longwave, divesh.kumar: Convert all calls to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in block module.

Issue #2089461 by thedavidmeister, deneo, Alan D., longwave, dsdeiz, stpaultim: Convert all calls to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in core/lib.

Issue #2055371 by ianthomas_uk, Xano, InternetDevels, alexpott: Replace all module_invoke_all() deprecated function calls in OO code.