Bastien <b...@gnu.org> writes:

> I'm not sure why the distinction between :open and :follow is needed
> in the context of the discussion for exporting attachments: is it
> because attachment need to be "open", not just followed?

The motivation is that the new behaviour for `:follow' is not compatible
with the previous one, since the signature changed. So, we have two
options: either we write a workaround, as is done for :export (i.e.,
`condition-case' with `wrong-number-of-arguments'), or we add new
keywords so old code still works during transition.

Thinking about it, we can stick to a single solution, e.g., the
`condition-case' workaround. Therefore we do not need to introduce a new
keyword. However, all "ol-" libraries need to be updated.

I'll do that instead.


Nicolas Goaziou

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