Issue #2219009 by pwolanin: Improve DX of Settings class.
Issue #1878302 by martin107, InternetDevels, nick_daffodil, chrisroane: Use 'delete' over 'remove' in the aggregator module.
Issue #2178725 by pwolanin, crowdcg, effulgentsia, Sutharsan: Make all core menu link machine names and the corresponding route names match.
Issue #2068349 by pcambra, swastik1608: Convert menu link SQL queries to the Entity Query API.
Issue #2068349 by pcambra, swastik1608: Convert menu link SQL queries to the Entity Query API.
Issue #2134857 by Xano, Wim Leers, Berdir, damiankloip: PHPUnit test the entity base classes.
Issue #2205155 by jibran, rteijeiro: Convert custom_block.js into a library.
Issue #2216565 by ianthomas_uk: Remove wrappers for SortArray.
Issue #2219913 by Mile23: Incorrect @covers/@coversDefaultClass breaks coverage reports.
Issue #2221925 by tstoeckler: Typo in ConfigTranslationUITest.
Issue #2221923 by tstoeckler: Use \Exception instead of Exception in config_get_config_directory().
Issue #1925492 by visabhishek, nod_, mkadin | YesCT: Small optimization for search on modules page.
Issue #2080547 by johnmcc, mrsinguyen, chertzog, Nafes: Remove Unused local variables from search module.
Issue #2212309 by joelpittet: Drupal\Core\Template and twig.engine docs, coding standards, and unused code cleanup.
Issue #2221503 by damiankloip: Missing row plugin text in Views UI says 'style'.
Issue #2219499 by Berdir, alexpott, Gábor Hojtsy, vijaycs85, swentel: Generalize language config override responsibility.
Issue #2030073 by alexpott: Config cannot be imported in order for dependencies.
Issue #2209997 by Mile23, larowlan, YesCT: Split ForumBreadcrumbBuilder in two.
Issue #2221789 by Schoonzie, marthinal, sidharthap | Berdir: Not possible to disable 'Save new revision' when enabled by default.
Issue #2224553 by longwave, swentel: Add _admin_route for field manager and admin/content.