Issue #3321634 by Spokje, andypost: Remove legacy experimental:true and its deprecation and test-files

Issue #3250342 by Spokje, smustgrave, rpayanm, quietone, xjm, catch, longwave: Deprecate "experimental: true" in .info.yml

Issue #3299853 by andypost, kim.pepper: Apply #[\AllowDynamicProperties] attribute to base classes to make PHP 8.2 log size sane

Issue #3295157 by mondrake: Fix 'Access to an undefined property' PHPStan L0 errors - public properties

Issue #3250585 by Spokje, ankithashetty, karishmaamin, quietone, catch, Gábor Hojtsy, longwave, daffie, xjm, andypost, benjifisher, bbrala, larowlan: Highlight deprecated modules and themes at admin/reports/status page, providing warning and link with explanation

Issue #3074585 by mikelutz, alexpott, Berdir, Mile23, heddn, effulgentsia, Wim Leers: [Symfony 5] Replace app.root and site.path string services with container parameters

Issue #3076797 by Wim Leers, lauriii, alexpott: \Drupal\Core\Extension\Extension's absence of validation has allowed multiple incorrect tests to be added

Issue #2701829 by alexpott, andypost, Soul88, Graber, EduardoMadrid, dawehner, Berdir, jibran, pingwin4eg, httang12: Extension objects should not implement \Serializable

Issue #2659940 by almaudoh, alexpott, phenaproxima, Jo Fitzgerald, markcarver, oriol_e9g, dawehner, dsnopek, jibran, larowlan: Extension System, Part III: ThemeExtensionList and ThemeEngineExtensionList

Issue #2881981 by foxtrotcharlie, Vidushi Mehta, vakulrai, Mile23, larowlan, dawehner, heddn: Mitigate Extension dependency on DRUPAL_ROOT

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2502621 by Pravin Ajaaz, hussainweb, Peacog, jhodgdon, ivanjaros: Replace implement notes with inheritdoc tag

Issue #2558247 by dawehner, catch, mradcliffe, jhedstrom, Berdir, jibran, effulgentsia, webchick: Remove rebuildAll() and module install from UpdatePathTestBase

Issue #2328111 by dawehner, martin107, neclimdul: Replace most instances of the DRUPAL_ROOT constant with the app.root container parameter.

Issue #2216695 by sun, Damien Tournoud, Wim Leers, brantwynn: Run-tests.sh broken on OS X ('Too many open files').

Issue #340723 by ParisLiakos, sun, Berdir, glennpratt, Cottser, swentel, alexpott, tstoeckler, Xano, tim.plunkett, BassistJimmyJam | beejeebus: Make modules and installation profiles only require .info.yml files.

Revert "Issue #340723 by ParisLiakos, sun, Berdir, glennpratt, Cottser, swentel, tstoeckler, Xano, tim.plunkett, BassistJimmyJam: Make modules and installation profiles only require .info.yml files."

This reverts commit b4c561d0.

Issue #340723 by ParisLiakos, sun, Berdir, glennpratt, Cottser, swentel, tstoeckler, Xano, tim.plunkett, BassistJimmyJam: Make modules and installation profiles only require .info.yml files.

Issue #2210197 by sun, longwave, Sutharsan: Remove public access to Extension::$type, ::$name, ::$filename.

Revert "Issue #2210197 by sun, longwave: Remove public access to Extension::$type, ::$name, ::$filename." Broke 'drush en simpletest' on testbots

This reverts commit 2c51074d.

This reverts commit ae8be3cc.