Issue #3426506 by kim.pepper, smustgrave, mstrelan, alexpott: Create enums for File exists options and deprecate consts

Issue #3419394 by quietone, longwave, smustgrave: File mime type and other file related words in the dictionary

Issue #2838474 by kim.pepper, rpayanm, alexpott, longwave, Spokje, andypost, 20th, mfb: Remove dependency of "file_system" service on "logger"

Issue #3328457 by xjm, dimitriskr: Replace most substr($a, $i) where $i is negative with str_ends_with()

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

Issue #2983058 by arnested, smustgrave, larowlan: FileUrlGenerator::transformRelative() edge case errors

Issue #3362088 by Lukas von Blarer, mondrake, Berdir: ExtensionMimeTypeGuesser doesn't support .avif

Issue #2921133 by quietone, VladimirAus, xjm, ankithashetty, longwave, Prem Suthar, smustgrave, benjifisher, AaronMcHale: Remove "Please" from the codebase

Issue #3374319 by catch, longwave: FileSystem::deleteRecursive() shouldn't log a message when it tries to delete a non-existent directory

Issue #3213745 by AlexGreen, mcdruid, dww, poker10, smustgrave: Add phtml files to the list of potentially malicious extensions

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

Issue #3027639 by catch, jonhattan, ankithashetty, Lal_, voleger, beunerd, cmlara, yogeshmpawar, Jose Reyero, drfuzetto, MiguelArber, smustgrave, longwave, Berdir, leandro713, Ambient.Impact, olli, amitaibu: Make css/js optimized assets path configurable

Issue #3331323 by Anas_maw, Yasser Samman: JSON mime type guesser returning application/octet-stream

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

Issue #3284133 by mondrake, alexpott: IETF RFC 9239 requires Javascript MIME type to be text/javascript

Issue #3136196 by Andrew Answer, nitesh624, nitvirus, OCTOGONE.dev, mfb: Add support for .FLAC, .OPUS and .AAC audio type of file with HTML 5 audio player

Issue #3324801 by Spokje, mondrake: Fix PHPStan L2 error "Property Foo::$bar has unknown class Baz as its type."

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

SA-CORE-2022-014 by elarlang, pwolanin, xjm, mcdruid, effulgentsia, greggles, jenlampton, larowlan, longwave

(cherry picked from commit 339bd673)

Issue #3164210 by jungle, sylus, Akhildev.cs, dww: Refactor array_merge() usage in loops as possible for performance

Issue #3197482 by longwave, Spokje, Taran2L, murilohp, catch, Gábor Hojtsy, daffie: Update Drupal 10 to depend on Symfony 5.4 (as a stepping stone to Symfony 6, for deprecation checking support)

Issue #3254553 by Leon Kessler, Berdir, Bladedu, cmlara: FileUrlGenerator::generate() does not work with externally hosted files using stream wrappers

Issue #3223209 by kim.pepper, dww, yogeshmpawar, daffie, larowlan, Berdir, andypost, phenaproxima, brianV, alexpott, AjitS, ravi.shankar, catch, quietone, trobey, Dave Reid, JacobSingh, imclean, tim.plunkett, Kars-T, amateescu, JeremyFrench, aaron: deprecate file_save_data, file_copy and file_move and replace with a service

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 #2719649 by Spokje, harsha012, jofitz, vprocessor, nikitagupta, cburschka, rasikap, hitesh-jain, quietone, longwave, mfernea, andypost, klausi, Malevi4, crazyrohila: Fix 'Drupal.Commenting.InlineComment.SpacingBefore' coding standard

Issue #3209239 by longwave: [Symfony 5] Symfony\Contracts\EventDispatcher\Event subclasses need return types

Issue #3032390 by alexpott, dww, Pancho, 3CWebDev, kim.pepper, larowlan, Berdir, catch, andypost, chr.fritsch, Wim Leers: Add an event to sanitize filenames during upload

Issue #3036494 by Berdir, alexpott, rgpublic, cilefen, kerasai, regilero: Race condition in ImageStyle::createDerivative()

Issue #3055193 by catch, martin107, jungle, mikelutz, longwave, andypost, alexpott, mondrake, tim.plunkett, larowlan: [Symfony 5] The "Symfony\Component\HttpFoundation\File\MimeType\MimeTypeGuesser" class is deprecated since Symfony 4.3, use "Symfony\Component\Mime\MimeTypes" instead

Issue #3070902 by dalin, mrinalini9, mrupsidown, Bunty Badgujar: Better logging for prepareDestination Exception

Issue #2937513 by eltori, longwave, klausi, catch, idebr: Fix 'Drupal.Commenting.DocComment.TagGroupSpacing' coding standard

Issue #3093564 by Dinesh18, longwave, Vinodhini.E, Berdir, kim.pepper: Remove all @deprecated code in core File system

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

Issue #3023015 by Berdir, kim.pepper, tinko, mikelutz: Replace usages of deprecated constants in file.inc

Issue #2620304 by kim.pepper, andypost, phenaproxima, mcdruid, alexpott, jibran, starshaped, kostyashupenko, nickolaj, Berdir, larowlan, catch, joachim, Mile23: htaccess functions should be a service