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From: Michael Heerdegen <michael_heerdegen@web.de>
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Subject: Re: Shorthands have landed on master
Date: Thu, 30 Sep 2021 06:26:47 +0200
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Bodertz <bodertz@gmail.com> writes:

> ;; Local Variables:
> ;; elisp-shorthands: (("-" . "testing-"))
> ;; End:

Yes, with that

(read-from-string "-") -> (testing- . 1)

So No Wayman was correct: Emacs doesn't like that ATM, the arithmetic
function `-' is not read as such any more in the above case.

Michael.