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Re: let*: Wrong type argument: stringp, nil

From: Yuri Khan
Subject: Re: let*: Wrong type argument: stringp, nil
Date: Wed, 29 Sep 2021 16:14:22 +0700 
On Wed, 29 Sept 2021 at 13:29, Emanuel Berg via Users list for the GNU
Emacs text editor <help-gnu-emacs@gnu.org> wrote:
> >       (let ((file (concat (locate-dominating-file (buffer-file-name)
> > ".python-version") ".python-version")))

> concat -> format

Why use either, when you have a perfectly good expand-file-name?
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