Issue #1856562 by andypost | sun: Convert "Subject" and "Message" into Message base fields.
Issue #2080311 by rhm50, amitgoyal, InternetDevels, Rajesh Ashok, pfrenssen, natemow, areke, chertzog | mrsinguyen: Clean up Drupal\system\Tests\Database\SelectTest.php.
Issue #2301975 by kim.pepper: Move drupal_is_front_page to PathMatcher service.
Issue #2301597 by joshi.rohit100: Remove drupal_prepare_form() as it is deprecated.
Issue #2300891 by joshi.rohit100: Remove format_backtrace() from error.inc as deprecated.
Issue #2300853 by joshi.rohit100: Remove language() method from bootstrap.inc as it is deprecated.
Issue #2301577 by ParisLiakos, joshi.rohit100: Remove drupal_alter() as it is deprecated.
Issue #2301587 by joshi.rohit100: Remove form_state_defaults() as it is deprecated.
Issue #2301601 by joshi.rohit100: Remove drupal_validate_form() as it is deprecated.
Issue #1587270 by klausi, greggles, sun: Forbid execution of PHP files in subfolders by default (except those needed by core).
Issue #2296237 by er.pushpinderrana: Replace check_plain() to Drupal\Component\Utility\String::checkPlain() in file module.
Issue #2302261 by benjy: Fixed Typo in migrate.schema.yml.
Issue #2301875 by dawehner, plach: Fixed Invalid SQL when running tests.
Issue #2301837 by er.pushpinderrana | jhodgdon: Fixed Missing @endcode on Entity API topic.
Issue #2208893 by ngocketit, longwave: Remove unused functions from Views.
Issue #2163245 by Mile23: Unit testing for \Drupal\Component\Utility\Variable.
Issue #658148 by bleen18, ShaunDychko, jhodgdon, g3r4, cferthorney, BBommarito, jbrauer, Cauliflower: Fixed The "access user profiles" permission is poorly named.
Issue #2030165 by Berdir, tim.plunkett, vijaycs85, tkuldeep17 | rteijeiro: Convert form_test_* functions to classes.
Issue #2163209 by andrewmacpherson, mgifford | Charles Belov: Add alternate text to file icon.
Issue #2301591 by joshi.rohit100: Remove drupal_rebuild_form() as it is deprecated.