How do i prevent emacs from adding coding information in the first line?

Question

In some files, especially .rb I have a problem where emacs forces me to have the following encoding line.

# -*- coding: utf-8 -*-

Even if I delete the line it will get written again once I save my file.

Is it possible to disable this feature?

user_487095 · Answer

It is the default behaviour in Emacs 28 not to write this line if the encoding is UTF-8.

At the time of writing, Emacs 28 has not yet been released, but, when it is, perhaps in 2022, upgrading should solve the problem.