Small typo in learning.ipynb

[aswanipranjal]

Hello, all. I've been going through the notebooks to understand how the algorithms work. I noticed a small typo in the Gini impurity part in learning.ipynb :

We select split which minimizes the Gini impurity in childre nodes.

It should be:

We select split which minimizes the Gini impurity in child nodes.

Can I submit a PR correcting them?

Awesome job on the Repo, btw.
Thank you!

[antmarakis]

I think it should also have an 'a' before 'split'.

Yes, you can make the PR. Nice catch.