Re: DOC select-frame: argument doc. missing

[Luc Teirlinck]

Richard Stallman wrote:

       The documentation of select-frame doesn't explain what the optional  
       argument 'no-enter' is for.

   It is not meant for users to use, so it doesn't need to be documented.

Unless I am overlooking something, it does not appear to be used at all.
The same applies to the no_enter argument to Fhandle_switch_frame.

Is this just a no-op argument for backward compatibility with old
calls that used an argument?  Or is it used somewhere dynamically from
Lisp code?  I believe that either a short mention in the two
docstrings, or maybe just a comment in frame.c could be helpful.

Sincerely,

Luc.