Documentation error
This is about https://github.com/Pebaz/nimporter/tree/nimporter-v2.0.0rc

On this image, on the right code block, at the top, 
it says `calculatorlib.nim` but has Python code inside, I think it should be `calculatorlib.py` ?.

![](https://raw.githubusercontent.com/Pebaz/nimporter/nimporter-v2.0.0rc/misc/Nimporter-Functionality.png)


- Which versions of Python it supports ?.
