Issue #3436255 by mondrake, longwave: Fix return typehinting for Compiler and EventSubscriber related classes

Issue #2663316 by omkar.podey, jofitz, alexpott, shashank5563, samuel.mortenson, Andrej Galuf, djsagar, silverham, juliaschwarz, lauriii, super_romeo, gawaksh, smustgrave, sakthi_dev, Pavan B S, lammensj, Wim Leers, camerongreen, quietone: Broken title in modal dialog when title is a render array

Issue #3328456 by xjm, dimitriskr, murilohp, smustgrave: Replace substr($a, 0, $i) with str_starts_with()

Issue #3394220 by claudiu.cristea, catch: Dialog options are not honoured when open a dialog using GET

Issue #3303874 by alecsmrekar, Wim Leers, smustgrave: Early rendering issue in big_pipe_page_attachments() for controllers returning Response objects

Issue #2616814 by dpi, Xano, geek-merlin, Hardik_Patel_12, jofitz, alexpott, Fabianx, catch, joachim, andypost, dawehner, daffie, cweagans, neclimdul: Delegate all hook invocations to ModuleHandler

Issue #3254250 by Spokje, longwave, catch, daffie: [Symfony 6] Retrieving a non-string value from "Symfony\Component\HttpFoundation\InputBag::get()" is deprecated

Issue #3222769 by bbrala, alexpott, longwave, Matroskeen: [November 8, 2021] Replace all list (array destructuring) assignment to the array syntax

Issue #3222251 by bbrala, longwave: [November 8, 2021] Replace all isset constructs with the null coalescing operator

Revert "Issue #3162016 by longwave, andypost, Hardik_Patel_12, catch, alexpott, daffie, Kristen Pol: [Symfony 6] Retrieving a non-string value from "Symfony\Component\HttpFoundation\InputBag::get()" is deprecated"

This reverts commit 8b8fc1ef.

Issue #3162016 by longwave, andypost, Hardik_Patel_12, catch, alexpott, daffie, Kristen Pol: [Symfony 6] Retrieving a non-string value from "Symfony\Component\HttpFoundation\InputBag::get()" is deprecated

Issue #3161983 by catch, longwave, Pooja Ganjage, sanjayk, daffie, Kristen Pol, dww, Gábor Hojtsy: [Symfony 6] Update EventDispatcherInterface type hints in constructors

Revert "Issue #3161983 by Pooja Ganjage, sanjayk, catch, longwave, daffie, dww, Gábor Hojtsy: [Symfony 6] Update EventDispatcherInterface type hints in constructors"

This reverts commit a9cee683.

Issue #3161983 by Pooja Ganjage, sanjayk, catch, longwave, daffie, dww, Gábor Hojtsy: [Symfony 6] Update EventDispatcherInterface type hints in constructors

Issue #3123210 by nitesh624, Hardik_Patel_12, jameszhang023, sanjayk, jungle, alexpott: Replace non-test usages of \Drupal::theme() with IoC injection

Issue #3055194 by catch, mikelutz, longwave, mkalkbrenner, hchonov: [Symfony 5] The signature of the "Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher::dispatch()" method should be updated to "dispatch($event, string $eventName = null)", not doing so is deprecated since Symfony 4.3

Issue #3104307 by Berdir, longwave, Gábor Hojtsy, Wim Leers, alexpott, andypost: Remove  BC layers in various Drupal\Core components

Issue #3048498 by jonathan1055, Lendude, naveenvalecha, klausi, alexpott, Gábor Hojtsy: [≈Nov. 11] Fix Drupal.Commenting.Deprecated coding standard

Issue #2818677 by msankhala, NickWilde, Berdir, alexpott, dimaro, poornima.n, sidharthap, dhirendra.mishra, keshav.k, xjm, mahtab_alam, ieguskiza, borisson_, catch, larowlan: Replace usages of deprecated method drupal_render_root()

Issue #2992542 by foxtrotcharlie: AjaxRenderer declares a $controllerResolver variable but never uses it

Issue #2916781 by timmillwood, tedbow, drpal, lauriii, Adita, andrewmacpherson, yoroy, amateescu, borisson_, ckrina: Allow off-canvas dialog to be rendered at the top of the page

Issue #2572613 by Malevi4, idebr, pfrenssen, Mile23, RajeevK: Fix 'Drupal.Array.Array.CommaLastItem' coding standard

Issue #2784443 by tedbow, Wim Leers, Cottser, tim.plunkett, droplet, drpal, nod_, lauriii: Move off-canvas functionality from Settings tray module into drupal.dialog.ajax library so that other modules can use it

Issue #2901726 by mfernea, gmario, finn.lewis, robertoperuzzo, rachel_norfolk: Fix 'Squiz.Functions.MultiLineFunctionDeclaration' coding standard

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 #2572619 by attiks, andypost, pfrenssen, vprocessor, tatarbj, andriyun, alexpott: Fix 'Drupal.Classes.ClassDeclaration' coding standard

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

Issue #2476947 by mdrummond, Wim Leers, davidhernandez, lauriii, joelpittet, andypost, Cottser, JeroenT, Manuel Garcia, rpayanm: Convert "title" page element into a block

Issue #2569083 by dsnopek, tim.plunkett, Wim Leers: Allow passing cacheable metadata to display variants (to enable Panels Everywhere)

Issue #2550941 by dsnopek, tim.plunkett, lslinnet: Allow passing contexts to display variants (to enable Panels Everywhere to use static context and relationships)

Issue #2559969 by alexpott: Make SafeStringInterface extend \JsonSerializable so we don't have to do so much string casting

Issue #2551989 by Wim Leers, Crell: Move replacing of placeholders from HtmlRenderer to HtmlResponseAttachmentsProcessor

Issue #2512062 by dsnopek, tim.plunkett, Wim Leers: VariantInterface extends ConfigurablePluginInterface so PageDisplayVariantSelectionEvent should allow passing configuration to the Variant (to enable Panels Everywhere)

Issue #2506581 by alexpott, Wim Leers, Fabianx, xjm, joelpittet, Cottser, dawehner: Remove SafeMarkup::set() from Renderer::doRender

Issue #2505989 by alexpott, dawehner, olli: Controllers render caching at the top level and setting a custom page title lose the title on render cache hits

Issue #2450993 by Wim Leers, Fabianx, Crell, dawehner, effulgentsia: Rendered Cache Metadata created during the main controller request gets lost