Emacs 30:
Support for the EditorConfig standard has been added, an editor-neutral way to provide directory local (project-wide) settings. It is enabled via a new global minor mode editorconfig-mode which makes Emacs obey the .editorconfig files.
https://www.gnu.org/software/emacs/manual/html_node/efaq/New-in-Emacs-30.html
Emacs 30:
https://www.gnu.org/software/emacs/manual/html_node/efaq/New-in-Emacs-30.html