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To: Juliusz Chroboczek <jch@irif.fr>
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Date: Tue, 19 Jan 2021 14:07:28 +0100
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Juliusz Chroboczek <jch@irif.fr> writes:

>>> Except that now I'm trying to update the README, and I'm finding the
>>> behaviour impossible to explain concisely.  I need to think.
>
>> How about:
>
> I think the problem is that the default value is not materialised =E2=80=
=94 the
> magic depends on whether the option was explicitly specified, the default
> value does not correspond to any possible value of the command-line optio=
n.
>
> I think the solution lies in making an explicit default value.  I'm
> thinking of "-turn auto" being the default, and behaving as we do
> currently if the option was not specified.  This is easier to explain,
> gives a clearer mental image to the user, and has the added advantage of
> being extensible -- people can hardly complain if the "auto" behaviour
> changes between versions.

Right, no objection to that!

> (I'm must resist the temptation of calling the value "magic".)

You could call it 'automagic'? ;)

-Toke