BOM \ufeff at beginning of org-babel-tangled file

Question

Recently, I have noticed that \ufeff (BOM for UTF-16) is getting prepended to files tangled using org-babel-tangle.

• Is my configuration wrong? If yes, which variable have I inadvertantly misconfigured?
• Is this a bug? If not, how do I prevent this from happening?

This causes \ufeff to be tangled before my emacs configuration init.el files and also before the #!/usr/bin/env .

I don't find anything when I grep 'utf-16' in my user-emacs-home.

My configuration includes:

    (setq locale-coding-system 'utf-8)
    (setq coding-system-for-read 'utf-8)
    (setq coding-system-for-write 'utf-8)
    (setq default-process-coding-system '(utf-8-unix . utf-8-unix))

and

    (set-terminal-coding-system 'utf-8)
    (set-keyboard-coding-system 'utf-8)
    (set-selection-coding-system 'utf-8)
    (prefer-coding-system 'utf-8)
    (set-default-coding-systems 'utf-8))