Issue #1998700 by kim.pepper, mhagedon: Use Symfony Request for core classes.
Issue #1997262 by andypost, nick_schuch, larowlan, tim.plunkett, jibran, chertzog, kim.pepper: Convert custom_block_delete_form() to new form interface.
Issue #2065571 by pwolanin, damiankloip, neclimdul: Add YAML Plugin discovery.
Issue #2061895 by sergeypavlenko: Remove calls to deprecated global $user in file module.
Issue #1987892 by disasm: Convert url_alter_test_foo() to a new style controller.
Issue #2067991 by alexpott: Fixed XDEBUG_SESSION cookie causes upgrade path tests to fail.
Issue #1935300 by dawehner, chx: Don't hardwire Database in Views filters, add regexp to DBTNG.
Issue #1932652 by Wim Leers, nirbhasa, quicksketch: Add image uploading to WYSIWYGs through editor.module.
Issue #2073197 by larowlan: Fixed Local actions 'add new forum|container' no longer found at admin/stucture/forums.
Issue #2066879 by claudiu.cristea: Apply coding standards for interface method declarations.
Issue #1443070 by CrashTest_: Added support for popular e-book formats, Google web formats, mkv and mka in file_default_mimetype_mapping().
Issue #2063405 by dawehner, Wim Leers, Crell: Update all access checkers to use static::ALLOW/static::DENY/static::KILL.
Issue #2072589 by legolasbo: Remove Unused local variable  from /core/modules/views/lib/Drupal/views/Plugin/views/join/Subquery.php.
Issue #2072557 by legolasbo, ksm.apw: Remove Unused local variable  from /core/modules/file/lib/Drupal/file/Tests/FileFieldRevisionTest.php.
Issue #2050097 by Gábor Hojtsy, Wim Leers: Map CKEditor languages to Drupal languages.
Issue #2072549 by legolasbo, phiit: Remove Unused local variable () from /core/modules/file/file.module.
Issue #2072583 by legolasbo: Remove Unused local variable  from /core/modules/views/lib/Drupal/views/ViewExecutable.php.
Issue #2072555 by legolasbo: Remove Unused local variable  from /core/modules/file/lib/Drupal/file/Tests/FileFieldValidateTest.php.
Issue #202973: Fix file permissions on ckeditor.module
Issue #2072551 by legolasbo: Remove Unused local variable  from /core/modules/file/file.field.inc.