> %w is not a formatting verb, so fmt.Prinf("%w") is not valid.
yes, i thought i was pasting fmt.Errorf("%w",err)
err1:= errors.New("error")
> err1= fmt.Errorf("fmt wrapping: %w",err1)
> fmt.Println(err1)
>
> err2:=errors.New("error")
> err3= fmt.Errorf("Wrapped: %w",err2)
> // Here, err3 is an error wrapping err2
> fmt.Println(err3)
>
i was trying to create a error 'class', i now realise fmt.Errorf isn't
capable/for that. i thought all wrapping was 'grouping' i now see another
use case that this handles. it was the two uses that confused me.
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