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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Namespaces - summary, conclusion
Date: Mon, 04 May 2020 18:00:15 +0300
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To: Philippe Vaucher <philippe.vaucher@gmail.com>
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 (message from Philippe Vaucher on Mon, 4 May 2020 14:42:58 +0200)
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> From: Philippe Vaucher <philippe.vaucher@gmail.com>
> Date: Mon, 4 May 2020 14:42:58 +0200
> Cc: Emacs developers <emacs-devel@gnu.org>
> 
> rename-file -> file-rename
> delete-file -> file-delete
> copy-file -> file-copy
> expand-file-name -> file-expand-name

These are different: in Emacs we have functions that work on _files_,
and we have functions that work on _file names_.  The first 3 above
are of the former kind, the last one is of the second kind (there are
a lot more of that kind).  We shouldn't mix them.