Issue #2340667 by YesCT, Pedro Lozano, alexpott, martin107: Protect Drupal\Core\Language\Language::id, and use getId().
Issue #2354699 by mpdonadio | dawehner: Fixed Watchdog entries caused by toolbar module.
Issue #2354301 by jmolivas: Fixed Composer require.php : invalid version constraint.
Issue #2302799 by alexpott, penyaskito: Fixed InstallerTestBase tests can not be run locally.
Issue #2350437 by rpayanm, hussainweb, Noe_ | dawehner: Mark unicode.inc functions as deprecated.
Issue #2354107 by mpdonadio, tstoeckler: Fixed field_ui_help() should check for the existence of modules before linking to their routes.
Issue #2353347 follow-up by dawehner, alexpott: Fixed Random failure in DisplayPathTest.
Issue #2235363 by jhodgdon, jessebeach, alexpott, Gábor Hojtsy: Document config dependencies.
Issue #2333747 by jhedstrom, tim.plunkett: Fixed run-tests.sh ignores phpunit tests when using the --module flag.
Issue #2355523 by penyaskito: Fixed InstallerTestBase tests should not require sqlite to be installed.
Issue #2355545 by lhangea, alexpott | YesCT: UserInstallTest testUserInstall() custom assert message not more helpful than the default.
Issue #2346931 by G-raph, LewisNyman, zaporylie, jOksanen, webmorozov: Fixed Dropbutton AJAX throbber looks awful.
Issue #2349637 by malcomio | nathanlawson91: Remove border from region header in Bartik.
Issue #2353729 by ultimike: D6->D8 Migration missing variable: user_mail_status_blocked_notify.
Issue #2355179 by legolasbo, er.pushpinderrana: Remove usage of form_get_cache() and form_set_cache().
Issue #2152521 by prashantgoel, LewisNyman, sghoweri, mrjmd, LoMo, JamesLefrère, Manjit.Singh: Fixed User login page looks cramped on mobile.
Issue #2352857 by thamas, tkoleary: Fixed Improve the display of trigger icon (pencil).
Issue #2296115 by jhodgdon, hussainweb: Fixed Several entity loadRevision() methods do not obey the interface contract.
Issue #2267545 by ParisLiakos: Standardize to RFC 5424 log levels.
Issue #2346129 by tstoeckler: Introduce a TraversableTypedDataInterface and use that for typehinting instead of ArrayElement.