Re: init-dir unification (Was: Use .emacs.d in savehist.el)

[Richard M. Stallman]

The argument NAME to init-directory, and the argument SUBDIRECTORY of
user-customization-file-name, make the code harder to understand.  As
far as I can see, they are unnecessary.  Why do you think this is
necessary?  If there is no important reason for it, let's get rid of
it.

Aside from that, the name user-customization-file-name is painfully
long.  Please call it user-profile-name or profile-file-name
instead.

That function belongs in subr.el or files.el, not simple.el.