Issue #2259567 by jcnventura, eelkeblok, joegraduate, thejimbirch, nvahalik, Lendude, andypost, anmolgoyal74, vacho, oriol_e9g, trackleft2, DamienMcKenna, smustgrave, nelp, LOBsTerr, twills, huzooka, Gauravvvv, xopoc, caesius, gyuhyon, mgifford, joelpittet, fietserwin, mark.labrecque, fabio84, lauriii, greggles, alexpott, mondrake, catch, quietone, drugan, jungle, DuaelFr: Support SVG files for theme logo setting

Issue #3364506 by Wim Leers, effulgentsia, catch, lauriii, borisson_, smustgrave, tim.plunkett, Dave Reid: Add optional validation constraint support to ConfigFormBase

Issue #3221793 by kim.pepper, larowlan, smustgrave, Wim Leers, joachim, gabesullice: Move file upload validation from file.module to constraint validators

Issue #3275557 by andypost, catch, heddn: Add webp image conversion to core's install profile's image style

Issue #59750 by quietone, larowlan, mikeryan, quicksketch, sreynen, kleinmp, kim.pepper, Bèr Kessels, chx, S3b0uN3t, ravi.shankar, mrddthi, webchick, neclimdul, Lendude: Required flag on file forms breaks on validation

Issue #3210129 by quietone, murilohp, xjm: Fix spelling for words used once, beginning with 'a' -> 'd', inclusive

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 #2903911 by joshmiller, longwave, anmolgoyal74, ankithashetty, init90, Pooja Ganjage, _gradient_, daffie, borisson_: Fix 'Drupal.Commenting.FunctionComment.ParamMissingDefinition' coding standard

Issue #3122912 by shaktik, siddhant.bhosale, S_Bhandari, martin107, swatichouhan012, kapilkumar0324, raman.b, paulocs, longwave, quietone, xjm: t() calls should be avoided , use $this->t() instead in Form Builders

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

Issue #3034072 by kim.pepper, Berdir, alexpott, jibran, larowlan, claudiu.cristea: Move file uri/scheme functions from file.inc and FileSystem to StreamWrapperManager

Issue #3038988 by Berdir, seanB: Remove support for empty destination in FileSystem::copy(), FileSystem::move() and FileSystem::saveData()

Issue #2244513 by kim.pepper, phenaproxima, 20th, andrei.dincu, beejeebus, Berdir, alexpott, jibran, andypost, larowlan, Chadwick Wood, acbramley, Wim Leers, sun, xjm, YesCT, chx, tim.plunkett: Move the unmanaged file APIs to the file_system service (file.inc)

Revert "Issue #2244513 by kim.pepper, phenaproxima, 20th, andrei.dincu, beejeebus, Berdir, jibran, alexpott, andypost, larowlan, Chadwick Wood, Wim Leers, acbramley, YesCT, sun, tim.plunkett, chx: Move the unmanaged file APIs to the file_system service (file.inc)"

This reverts commit 56be1a03.

Issue #2244513 by kim.pepper, phenaproxima, 20th, andrei.dincu, beejeebus, Berdir, jibran, alexpott, andypost, larowlan, Chadwick Wood, Wim Leers, acbramley, YesCT, sun, tim.plunkett, chx: Move the unmanaged file APIs to the file_system service (file.inc)

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

Issue #2954884 by msankhala: Cannot save theme settings form for themes without logo or favicon features

Issue #1472946 by gnuget, andypost, mmrares, sidharthap, kiamlaluno, Himanshu5050, dineshkumares, amit.drupal: Remove usages of deprecated function drupal_realpath() throughout core functions

Issue #2873696 by nvexler, wengerk, gido, Jo Fitzgerald, xjm: Add @internal to core classes, methods, properties to Form Classes

Issue #2482783 by dmsmidt, alexpott, mgifford, 20th, Sutharsan, Jo Fitzgerald, tim.plunkett, dandaman, xjm: File upload errors not set or shown correctly

Issue #1862892 by oriol_e9g, joseph.olstad, vaplas, G.I.Joe, leopathu, peterpoe, cilefen, xjm, larowlan: When a theme has a managed_file field and a submit callback, call to undefined function error is thrown

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 #2048887 by pguillard, yoroy, Anul, rpayanm, meeli, ifrik, Bojhan, xjm: Cleanup user interface text on appearance/settings

Issue #2285311 by joelpittet, tomatkins, susannecoates: Theme's "Path to custom logo" always validated even if "Use the default logo" is set

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

Issue #2620442 by Lendude: Theme logo upload settings are shown even if the file module is not installed

Issue #2620176 by joelpittet, markcarver, hatuhay: Logo image settings form is broken, breaks per-theme overrides and can result in data loss

Issue #2574975 by alexpott, Cottser, izus: Allow (base-)themes to be excluded from the UI (e.g. blocks, Appearance)

Issue #1006266 by alexpott, ryanissamson, Tor Arne Thune, CrookedNumber: Saving theme-specific theme settings with no logo creates Undefined index error when file module enabled

Issue #2005546 by mdrummond, joelpittet, Manuel Garcia, lauriii, lokapujya, epari.siva, hosef, rpayanm, emma.maria, HOG, zetagraph, wmortada, rteijeiro, Cottser, hussainweb, madhavvyas: Use branding block in place of page template branding variables (site name, slogan, site logo)

Revert "Issue #2388749 by alexpott, adci_contributor, ParisLiakos: Register symfony's mime guessers if they are supported"

This reverts commit 4dae1d99.

Issue #2388749 by alexpott, adci_contributor, ParisLiakos: Register symfony's mime guessers if they are supported