Re: [Emacs-diffs] master 7572740 3/3: Add error handling to magic-mode-alist

[Stefan Monnier]

> +                               "Problem in magic-mode-alist with element %s"
> +                               re))))))))

I recommend to always use %S when printing an Elisp value for error
reporting to help debug problems, and only use %s when you want to embed
a string.  %s leads to weird results when printing structures that
contain strings, such as:

    (format "%s" '("a)" "b"))
    =>
    "(a) b)"


-- Stefan