Issue #2033959 by borisbaldinger, Gábor Hojtsy, thamas, YesCT: Improve design of language detection and selection settings page.

Issue #2100351 by grisendo, pfrenssen, Gábor Hojtsy, YesCT, penyaskito: Fixed Date format name 'custom' is reserved but not checked for.

Issue #2057259 by alexpott, cweagans, swentel: Fixed Malformed modulename.info.yml file causes fatal error.

Issue #2099363 by tim.plunkett, mtift, swentel: Allow single config files to be imported and exported (Resolve regression from Views in Drupal 7).

Issue #2102467 by InternetDevels, sidharthap | vijaycs85: Remove drupal_set_title() in path module controllers.

Issue #2078879 by pwolanin, dawehner, Xano: Fixed DerivativeDiscoveryDecorator doesn't check/enforce the proposed derivative fetchers implement interface DerivativeInterface.

Issue #1934498 by attiks, Jelle_S, David_Rothstein, effulgentsia, tstoeckler: Allow the image style 'itok' token to be suppressed in image derivative URLs.

Issue #1988508 by katbailey, aspilicious, dawehner: Stop pretending we support Symfony bundles when we really just have service providers.

Issue #2028039 by ParisLiakos, jsbalsera, undertext, mcrittenden, xeniak, amateescu: Expand ItemInterface (aggregator.module) with methods.

Issue #2113015 by Wim Leers, amateescu: Add drupal_merge_attached() function, to merge #attached assets.

Issue #1975962 by Wim Leers, jibran, c4rl, amateescu: Move comment_links() into CommentRenderController.

Issue #2102125 by dawehner, tim.plunkett, neclimdul, pwolanin, YesCT, damiankloip, Tim Bozeman: Big Local Task Conversion.

Issue #2019911 by johnmcc: Add install requirement that open_basedir() = Off since 8.x currently doesn't support it.

Issue #2062183 by cloud2006, LinL, m1r1k, likin: Remove calls to deprecated global  in core/modules/user/lib/Drupal/user/AccountFormController.php.

Issue #2113441 by damiankloip: Move remaining views.module helper functions to Drupal\views\Views class.

Issue #1951386 by benjy, theduke, andypost, tim.plunkett: Fixed Extend BlockPluginInterface::access to allow passing in an account.

Issue #2102441 by sidharthap, -enzo-, InternetDevels, rteijeiro: Remove drupal_set_title() in config module controllers.

Issue #2095943 by dotoree, Tim Bozeman: Core modules and themes missing the version attribute in info.yml.

Issue #2091335 by lostkangaroo, cosmicdreams, batigolix, yingtho, neclimdul: Fix up hook_help for the help module

Issue #2107137 by dawehner, damiankloip, tim.plunkett: Fix the DX for declaring custom access checkers.

Issue #338403 by klausi, jhodgdon, grisendo, YesCT, drewish: Use {@inheritdoc} on all class methods (including tests).

Issue #1982256 by mortendk, rteijeiro, tim.plunkett, LewisNyman, tlattimore, yannickoo, ry5n: Clean up html.html.twig markup.

Issue #2061929 by likin, m1r1k, robmc, InternetDevels: Remove calls to deprecated global  from language.module.

Issue #2105983 by mr.baileys, jhodgdon, vijaycs85, a_thakur: Make sure all YML files in Search module have no type-casting to string.