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> I just wanted to test the behavior of os.remove on Windows compared to Linux.
> And I discovered something.
> In case of errors, functions os.remove and os.rename return 3 values:
>  1. nil
>  2. error message (string)
>  3. errno (number)
> But looking at the documentation, neither the 5.1.4 nor the 5.2.0
> version mention the extra errno return value.
> Is that a hidden feature or an omission ?

An omission. Thanks for pointing it.

-- Roberto