Issue #3432602 by alexpott, phenaproxima: Allow a site to be installed from configuration with no profile

Issue #2511308 by dimitriskr, ankithashetty, smustgrave, quietone, Wim Leers: Rename RendererInterface::renderPlain() to ::renderInIsolation()

Issue #3256524 by mondrake: [11.x] Adjust Database API to remove deprecated Drupal 10 code in Drupal 11

Issue #3189301 by Spokje, xjm, smustgrave: Use \Psr\Http\Client\ClientExceptionInterface instead of \GuzzleHttp\Exception\TransferException

Issue #3416697 by longwave, Spokje, sun, larowlan: Remove install container definitions of FileSystem and StreamWrapperManager

Issue #3406697 by alexpott, chr.fritsch: Fix notice in _install_prepare_import() due to alternate approach to translations

Issue #3410093 by bnjmnm: [regression] install_get_form does not allow install_settings_form ['driver'] to be null

Issue #3256642 by mondrake, daffie, yogeshmpawar, alexpott, tmaiochi, quietone, larowlan, catch: Introduce database driver extensions and autoload database drivers' dependencies

Issue #3328454 by xjm, Bhanu951, jidrone, smustgrave: Replace most strpos() !== FALSE or === FALSE with str_contains()

Issue #2806009 by alexpott, JvE, Berdir, Dmitriy.trt, jhodgdon, lokapujya, VladimirAus, Gábor Hojtsy, Jose Reyero, Anybody, kristiaanvandeneynde, Sutharsan, casey, smustgrave, nod_: Installing a module causes translations to be overwritten

Issue #3247553 by alexpott, realityloop: $install_state['settings_verified'] incorrectly set when config_sync_directory is missing

Issue #3155400 by jungle, alexpott: Change $requirements["$file file writeable"] to $requirements["$file file writable"]

Issue #3001430 by alexpott, _utsavsharma, Oscaner, lauriii, smustgrave, ifux, deviantintegral, pameeela: Unable to uninstall base theme and subtheme via config sync at the same time

Issue #2937515 by Spokje, quietone, idebr, longwave, SherFengChong, anweshasinha, borisson_, mfernea, xjm, bbrala, daffie, Berdir: Fix Drupal.Array.Array.[ArrayClosingIndentation, ArrayIndentation] coding standard

Issue #2941148 by quietone, bruno.bicudo, ravi.shankar, Sweetchuck, beatrizrodrigues, lucienchalom, VitaliyB98, WagnerMelo, sophiavs, ankitjain28may, daffie, longwave, Sutharsan, borisson_, cosmicdreams, heykarthikwithu, catch: Fix Drupal.Commenting.FunctionComment.MissingReturnType

Issue #3085219 by mherchel, jwilson3, lauriii, andy-blum, javi-er, deviantintegral, raman.b, kostyashupenko, komalk, rootwork, rkoller, saschaeggi, Abhijith S, cindytwilliams, benjifisher, AaronMcHale, nod_, Gábor Hojtsy, ckrina, alexpott, huzooka: Installer is not very usable in Claro

(cherry picked from commit 748dd319)

Issue #3112283 by ravi.shankar, mpdonadio, andregp, daffie, jhedstrom, alexpott, andypost, pifagor, vladbo, JeroenT, voleger, cliddell: Replace REQUEST_TIME in non-OO and non-module code

Issue #2833864 by RoSk0, colan, ressa, Chi, alexpott, joachim, loopy1492, zoiosilva: Unmet installation requirements may contain render elements

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

Issue #697946 by voleger, pguillard, pillarsdotnet, andypost, alansaviolobo, alexpott, vaibhavjain, MerryHamster, sja112, kim.pepper, shaktik, ravi.shankar, Pooja Ganjage, daffie, Mile23, legolasbo, joelpittet, almaudoh, xjm, Berdir, scor: Properly deprecate module_load_include() and move it into \Drupal::moduleHandler() service

Issue #2871357 by alexpott, kriboogh: Installer tasks using multiple batch sets in non-interactive mode do not get executed

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

Issue #2347783 by kim.pepper, andypost, almaudoh, gumanist, aleevas, rodrigoaguilera, Berdir, saurabh-2k17, Spokje, dhirendra.mishra, alexpott, paulocs, izus, Wim Leers, KapilV, naveenvalecha, anmolgoyal74, subson, yo30, harsha012, mrinalini9, daffie, voleger, dww, fietserwin, tim.plunkett, joachim, larowlan: Deprecate drupal_get_path() and drupal_get_filename() and replace with ExtensionList::getPath() and ExtensionList::getPathname()

Issue #2238561 by alexpott, dawehner, andypost, bradjones1, ridhimaabrol24, jofitz, eiriksm, Darren Oh, kalyansamanta, znerol, neclimdul, catch, pwolanin: Use the default PHP session ID instead of generating a custom one

Issue #2625820 by tstoeckler, alexpott, mirom, valthebald, pfrenssen, raman.b, Mile23, andypost: install_check_translations() sometimes incorrectly returns NULL instead of array

Issue #3151118 by alexpott, Beakerboy, kapilkumar0324, anmolgoyal74, jungle, heddn, Mile23, andypost, daffie: Include bootstrap.inc using composer

Issue #3176652 by Erik Frèrejean: Inline documentation references removed function `drupal_installation_attempted`

Issue #3172537 by andypost, mikelutz, Gábor Hojtsy, kim.pepper: Passing a command as string when creating a "Symfony\Component\Process\Process" instance is deprecated since Symfony 4.2, pass it as an array of its arguments instead, or use the "Process::fromShellCommandline()" constructor if you need features provided

Issue #3157895 by dww, andypost, alexpott: Move 'install_time' state update from \Drupal\Core\Installer\Form\SiteConfigureForm to installed_finished()