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From: Simon Josefsson <jas@extundo.com>
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Subject: Re: -request-set-mark interface
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On 16 Feb 2001, Paul Jarc wrote:

> The 5.8.8 info says:
> #`(nnchoke-request-set-mark GROUP ACTION &optional SERVER)'
> ...
> #     ACTION is a list of mark setting requests, having this format:
> #
> #          (RANGE ACTION MARK)
> #
> #     Range is a range of articles you wish to update marks on.
> ...
> #     An example action list:
> #
> #          (((5 12 30) 'del '(tick))
> #           ((10 . 90) 'add '(read expire))
> #           ((92 94) 'del '(read)))
>
> Is this right?  It seems that the second action should be:
>    (((10 . 90)) 'add '(read expire))
> Can RANGE really be a single range (a number or cons of two numbers),
> or is it always a list of ranges?

RANGE can be a cons of two numbers (like in the example, which I think is
correct).  I don't think ranges are allowed to be a single number.  The
range EBNF don't indicate that, and the gnus-range-* functions doesn't
seem to handle it either.