Issue #3409456 by plopesc, smustgrave, quietone, e0ipso, catch: Remove SDC deprecated code before 11.0.0

Issue #3352256 by e0ipso, plopesc, bbrala, longwave, dww, catch, larowlan: Move code from the experimental SDC module to core

Issue #3425337 by mondrake: Fix root namespace classes DebugClassLoader forward compatibility warnings

Revert "Issue #3425337 by mondrake: Fix root namespace classes DebugClassLoader forward compatibility warnings"

This reverts commit ea9cc753.

Issue #3425337 by mondrake: Fix root namespace classes DebugClassLoader forward compatibility warnings

Revert "Issue #3425337 by mondrake: Fix root namespace classes DebugClassLoader forward compatibility warnings"

This reverts commit ff7c5de3.

Issue #3425337 by mondrake: Fix root namespace classes DebugClassLoader forward compatibility warnings

Issue #3112295 by mondrake, Taran2L, acbramley, cliddell, mpdonadio, smustgrave, Hardik_Patel_12, AkashKumar07, ravi.shankar, alexpott, andypost, daffie, JeroenT, vladbo, pifagor, voleger: Replace REQUEST_TIME in rest of OO code (except for tests)

Issue #3185807 by andregp, quietone, lucienchalom, elber, yogeshmpawar, jungle, Tauany Bueno, tmaiochi, xjm, smustgrave: Fix or ignore some words starting with "w"

Issue #3270148 by jonathanshaw, murilohp, catch, smustgrave, longwave, larowlan, andypost, alexpott, quietone: Provide a mechanism for deprecation of variables used in twig templates

Issue #3115445 by mherchel, Ratan Priya, jedihe, alexdmccabe, selvakumar-96, Neslee Canil Pinto, catch, joycehutch, gonssal, Daniel Korte, shashank5563, Luke.Leber, SKAUGHT: Add a new clean_unique_id Twig filter for Html::getUniqueId

Issue #3356337 by Spokje, mondrake: Fix incorrect type hint and make daily "updated deps" QA jobs pass

Issue #3268835 by quietone, smustgrave, ravi.shankar, xjm, borisson_, catch: Fix method comments in non tests for Drupal.Commenting.DocComment.ShortSingleLine

Issue #3301853 by matthieuscarset, mherchel, lauriii, pdureau, dww, Chi, smustgrave: Create twig filters: |add_class and |set_attribute

Issue #3266568 by mxr576, sourabhjain, quietone: Refactor array_merge() usage in loops as possible for performance

Issue #3328443 by xjm, rpayanm, alexpott, catch, longwave: Replace most strpos() === 0 or !== 0 with str_starts_with()

Issue #2574981 by Manjit.Singh, dimaro, wengerk, darol100, izus, pguillard, vsujeetkumar, Himanshu5050, snehi, paulocs, rakesh.gectcr, jofitz, _utsavsharma, charginghawk, rajeshwari10, sdstyles, quietone, benjifisher, marcusvsouza, LoMo, joelpittet, justAChris, cilefen, YesCT, mradcliffe, spitzialist, annajl, jhodgdon, catch, alexpott, Sabbi0612, kattekrab, Mile23, antojose, leanderl, rodrigoac: Fix grammar ("an URL" should be "a URL") and consistent use of URL (not "url" / "Url") in documentation only

Issue #3268829 by quietone, bbrala: Fix class property comments for Drupal.Commenting.DocComment.ShortSingleLine

SA-CORE-2022-016 by fabpot, nicolas.grekas, xjm, lauriii, alexpott, Berdir, larowlan, catch, longwave, cilefen, james.williams, benjifisher

Issue #3274474 by mondrake, longwave, andypost, Spokje, catch, alexpott: Fix 'Access to an undefined property' PHPStan L0 errors

Issue #3306864 by lauriii, mherchel, alexpott: Integrate Twig with Symfony VarDumper for improved debugging experience

Issue #3293122 by lauriii: Document \Drupal\Core\Template\TwigExtension::getPath $parameters argument as optional

Issue #3254245 by kim.pepper, Jeya sundhar, mrweiner, bakulahluwalia, Berdir, catch, newaytech, Summit: TypeError: Argument 1 passed to Drupal\Core\File\FileUrlGenerator::generateString() must be of the type string, null given

Issue #3106216 by Spokje, longwave, alexpott, apaderno, Hardik_Patel_12, daffie: Remove unused variables from core

Issue #3094493 by longwave, Gábor Hojtsy, alexpott, naveen433, Chi, catch, andypost, Krzysztof Domański, shaal, xjm, fgm, Luke.Leber, daffie, Berdir, Fabianx, effulgentsia: Upgrade to Twig 3

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

Issue #3239860 by alexpott, lauriii: \Drupal\Core\Template\TwigExtension::renderVar() can result in deprecations in PHP 8.1

Issue #3239859 by alexpott, longwave: \Drupal\Core\Template\Loader\ThemeRegistryLoader::getCacheKey() causes deprecations on PHP 8.1

Issue #3239762 by alexpott, daffie: \Drupal\Core\Template\AttributeString::__toString() can cause deprecations in PHP 8.1

Issue #2669074 by kim.pepper, Berdir, gaydabura, andypost, ravi.shankar, KapilV, Wim Leers, bradjones1, nickolaj, alexpott, mondrake, 20th, yogeshmpawar, gaurav.kapoor, voleger, Pavan B S, Neslee Canil Pinto, aerozeppelin, Cameron Tod, daffie, dhruveshdtripathi, abramm, Nono95230, s.messaris, Mile23, claudiu.cristea, larowlan, catch, jibran, SpadXIII: Convert file_create_url() & file_url_transform_relative() to service, deprecate it

Issue #3014121 by Geordi, shreyakaushik11, anmolgoyal74, msankhala, rwohleb, rachel_norfolk, akanksha-hp, jhodgdon: Attribute.php code snippet not properly escaped

Issue #3183673 by jonathan1055, longwave: Fix 'Drupal.Commenting.DocComment.ShortFullStop' coding standard - part 1 auto-fixes