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Cake day: October 20th, 2023

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  • First, for making sure the autosave files—the ones prefixed and suffixed by “#”—are cleaned up, ensure that delete-auto-save-files is non-nil (the default) and, if using Emacs 28 or later, set kill-buffer-delete-auto-save-files to non-nil (that would normally be t). As for the backup files ending in “~”, those are created on saving a modified file by default and their creation is disabled by setting make-backup-files to a non-nil value.

    All of this can be achieved, assuming you’re using Emacs 28 or later, by adding

    ;; Disable backup files.
    (setf make-backup-files nil)
    ;; Prompt to delete autosaves when killing buffers.
    (setf kill-buffer-delete-auto-save-files t)
    

    to your init file.