> I think one of them is enough, since we already chose commas, why
quoted text
> do we need to add spaces? If you have some strong reason to add it,
> I have no objections.
>

It is just for simpler implementation. It is actually harder to restrict the separator to only commas insted of allowing both spaces and commas, because I rely on functions used for the integer vector handling. 

Maybe I should change those functions to be more generic and thus to allow more stricter input, but I am not sure if its worth it. Isn't a more permissive input format desirable?
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