Issue #2089351 by thedavidmeister, meba: Convert all calls to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in core/includes.

Issue #2061967 by Maxis, sergeypavlenko, m1r1k: Remove calls to deprecated global  in overlay module.

Issue #2062243 by chertzog, johnmcc, m1r1k: Remove calls to deprecated global  in core/modules/node/node.pages.inc.

Issue #2062117 by anpolimus, m1r1k: Remove calls to deprecated   = ['user'] in core/modules/node/lib/Drupal/node/Access/NodeRevisionAccessCheck.php .

Issue #2037569 by tstoeckler, ParisLaikos, wildflower_0002, pfrenssen, tim.plunkett: Remove design_test module.

Issue #1972990 by pwolanin, Dean Reilly, dawehner, Jberges, dokumori, AjitS, tim.plunkett: Convert tracker_page() to a Controller.

Issue #2057973 by aspilicious, Wim Leers: Don't add Edit module's data- attributes on pseudo fields (as used e.g. by Display Suite).

Issue #2049207 by dlu, blakehall, janstoeckler, ramlev, Moderate | Cottser: Replace .tpl.php with .html.twig in documentation.

Issue #1829170 by LinL, socketwench, vijaycs85, mtift, LittleCoding, andypost, dawehner, ianmthomasuk: Convert the Maintenance Theme variable to settings.

Issue #2103145 by tim.plunkett, damiankloip, neclimdul: Fixed ParameterConverter mangles raw values.

Revert "Issue #2057401 by plach, socketwench, kfritsche: Fixed Make the node entity database schema sensible."

HEAD broken; rolling back temporarily.

This reverts commit c72f39ad.

Issue #2057401 by plach, socketwench, kfritsche: Fixed Make the node entity database schema sensible.

Issue #1653026 by damiankloip, alexpott, sun, tim.plunkett, dawehner, mtift: Fixed All configuration values are stored as strings.

Issue #1936216 by stkrzysiak, kfritsche, Schnitzel, webflo, grisendo: Fixed Configuration language selectors should have English even if English is not on the site.

Issue #2095693 by Xano, tim.plunkett: Fixed FilterFormatAccessController always grants access for any operation on the fallback format.

Issue #1953408 by swentel, aspilicious, andypost, yched: Remove ArrayAccess BC layer from field config entities.

Issue #2095613 by juanolalla, g.oechsler, grisendo | YesCT: Convert all plugin IDs in local_tasks().yml to 'module_name().foo_bar()' naming convention to match routing convention.

Issue #2049207 by dlu, blakehall, janstoeckler, ramlev, Moderate | Cottser: Replace .tpl.php with .html.twig in documentation.

Issue #2096595 by neclimdul, damiankloip, tim.plunkett, Mile23, ParisLiakos: Make all PHPUnit tests pass with --strict.

Issue #2080401 by Bladedu, mrsinguyen, lokapujya, pfrenssen: Remove Unused local variable  from /core/modules/simpletest/lib/Drupal/simpletest/Tests/SimpleTestTest.php.

Issue #1798732 by sun, Dean Reilly, mbrett5062, chx, westie, alexpott, juanolalla, Mark Carver, catch, jthorson, cam8001, Berdir: Convert install_task(), install_time() and install_current_batch() to use the state system.

Issue #2100329 by cosmicdreams: Use \Drupal instead of Drupal to make IDEs and static code analyse tools happy.

Issue #1587270 by klausi: Added comment in .htaccess describing how to forbid execution of PHP files in subfolders.