Issue #2788087 by alexpott, dawehner, shafiqhossain: Drupal 8: You have requested a non-existent service "router.route_provider.old"

Issue #2208429 by dawehner, almaudoh, alexpott, jibran, Xano, donquixote, amitgoyal, bircher, stefan.r, Mile23, alvar0hurtad0, Berdir, andypost, larowlan: Extension System, Part III: ExtensionList, ModuleExtensionList and ProfileExtensionList

Issue #2931047 by Dropa, D34dMan, borisson_, catch: hook_post_update_NAME documentation is misleading

Issue #2932865 by kiamlaluno, joachim: Incorrect description for ExtensionDiscovery::scanDirectory()

Issue #2282119 by amateescu, jibran, Jo Fitzgerald, yched, plach, timmillwood, fago, Sam152, larowlan: Make the Entity Field API handle field purging

Issue #2885309 by vaplas, drewklein, pk188, alexpott, Ayesh, arunkumark, andypost, klausi, xjm, mondrake: [PHP 7.2] each() function is deprecated

Issue #2901562 by mfernea, Jo Fitzgerald, Yogesh Pawar, 3ssom, Mile23, borisson_: Fix 'Squiz.WhiteSpace.SuperfluousWhitespace' coding standard

Issue #2695109 by dpi, willzyx, Sam152, dawehner: Cache bins are not deleted when the module that declares them is uninstalled

Issue #2913912 by alexpott, phenaproxima, dawehner, amateescu, catch: URL generator may have a stale route provider during module installation

Revert "Issue #2913912 by alexpott, phenaproxima: URL generator may have a stale route provider during module installation"

This reverts commit 391b7103.

Issue #2913912 by alexpott, phenaproxima: URL generator may have a stale route provider during module installation

Issue #2851468 by tameeshb, dhirendra.mishra, alexpott, joelpittet: Wrong usage of file_prepare_directory in hook_install documentation

Issue #2572791 by Mile23, andriyun, attiks, RoSk0: Fix 'Drupal.WhiteSpace.OpenBracketSpacing' coding standard

Issue #2901739 by andriyun, Jo Fitzgerald, mfernea, xjm: Fix 'Squiz.Arrays.ArrayDeclaration' coding standard

Issue #2882784 by harsha012, douggreen, joelpittet: Fix ThemeHandlerInterface::setDefault() deprecation code example in header comment

Issue #2679008 by webflo, stBorchert, clemens.tolboom, gilesmc, dawehner: Module weight is not taken into account after module installation

Issue #2872611 by alexpott: Optimise \Drupal\Core\Extension\ThemeHandler::refreshInfo() for the early installer

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 #2853163 by douggreen: ThemeInstaller is missing protected variable declaration for injected themeHandler

Issue #2194783 by Berdir, vprocessor, andypost, Antonnavi, tim.plunkett, Crell, Mile23, catch: Rename EntityTypeInterface::isSubclassOf() to ::entityClassImplements()

Issue #2725839 by Mile23, dawehner, xjm, donquixote, catch: Remove Drupal\Core\Extension\ExtensionDiscovery::getInfoParser() since it is dead code

Issue #2635784 by Manuel Garcia, sidharthap, cilefen, veerasekar89, gambry, catch, alexpott, Cottser, dawehner, joelpittet: Deprecate ThemeHandler::setDefault() in favour of configuration and replace usages

Issue #2778479 by kiamlaluno: ModuleHandler::buildImplementationInfo() comment contains a reference to not existing function

Issue #1920902 by neclimdul, larowlan, alexpott, chx, sun, jthorson, damiankloip, Berdir, Mixologic, YesCT, hussainweb, rcaracaus, cweagans, catch, jibran, msonnabaum, dawehner, webchick, anavarre, heyrocker: Add a Drupal Yaml wrapper so we can default to PECL Yaml component if it is available

Issue #2667242 by Anul, felribeiro, eojthebrave, pranavbabbar: Use consistent terminology when referencing administration themes in the UI (not "admin theme")

Issue #2329453 by alexpott, joelpittet, hussainweb, kaidjohnson, andriyun, JohnAlbin, mirie, steveoliver, quicksketch, geerlingguy, RobLoach, jenlampton, SebCorbin, pablo.guerino, afoster, markcarver, danbohea, andypost, catch, donquixote, marcvangend, David_Rothstein, LewisNyman, neclimdul: Ignore front end vendor folders to improve directory search performance

Issue #2594937 by Peacog, cilefen, Sagar Ramgade, chgasparoto, aerozeppelin, iStryker, feraline, alvar0hurtad0, Cottser, Wim Leers, xjm, sebas5384, almaudoh, gvso, racarvalho1987: Empty 'libraries:' in theme .info.yml file produces confusing PHP warning

(cherry picked from commit 1694030b)

Issue #2605654 by Mile23, donquixote, dawehner, alexpott, catch: Modify Drupal\Core\Extension\ExtensionDiscovery to allow for scanning multiple file systems, enabling vfsStream testing

Issue #2721921 by er.pushpinderrana, Pashupathi Nath G, shashikant_chauhan, joachim: @code tag showing on docs for ExtensionDiscovery

Issue #2380293 revert by dawehner, willzyx, mpdonadio, jibran, alexpott, damiankloip, cilefen, Berdir: Properly inject services into ModuleInstaller