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

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

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

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 #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 #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 #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 #3021450 by kim.pepper, jibran, voleger, alexpott, Berdir: Add @trigger_error to deprecated functions in file.inc and replace their usages

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 #2796329 by Wim Leers: \Drupal\Core\File\MimeType\ExtensionMimeTypeGuesser maps the 'js' extension to the 'application/x-javascript' MIME type instead of 'application/javascript'

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

Issue #1392754 by tss, justAChris, jhodgdon: Comply with new documentation standards for @file for namespaced class files

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

Issue #1921558 by ParisLiakos, xjm, Dave Reid: Convert file_get_mimetype() to use Symfony MimeTypeGuessers.

Issue #2045927 by herom, martin107, ianthomas_uk, Xano, michaellander, Sutharsan: Replace all drupal_alter() deprecated function calls.

Issue #1443070 by CrashTest_: Added support for popular e-book formats, Google web formats, mkv and mka in file_default_mimetype_mapping().

Nate Lampton authored Oct 30, 2011 and catch committed Nov 01, 2011

Issue #22336 by quicksketch, scor, boombatower, and rfay. Move all core Drupal files under a core subdirectory.

- Patch #1239376 by Dave Reid: .ogg file extension incorrectly mapped to 'application/ogg' in file_default_mimetype_mapping().

- Patch #331171 by pwolanin, mfb, drewish: allow modules to alter the MIME extension mapping rather than setting a huge variable.

- Patch #520664 by rfay, quicksketch: file_get_mimetype() should not be case-sensitive. Comes with more and better tests.

- Patch #473652 by Damien Tournoud, catch: removed unneeded loop from file_get_mimetype() and further clean-up.