Fix average_of_squares bug and correct convert_numbers doc#7

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mariiakzmn wants to merge 2 commits intoUCL-COMP0233-2022-2023:mainfrom

mariiakzmn:main

Commits on Nov 16, 2022

Fixed average_of_squares bug and corrected convert_numbers doc
mariiakzmn
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Commits on Nov 17, 2022

Getting started with Sphinx and modifying docs
mariiakzmn
committed