Sandra, there was a merge conflict due to the renaming of the test spec file, I resolved it locally.

I like the addition of the bonus iterations. I find both a considerably harder than the rest. I added an extra bit of clarification regarding how values of different types should be added up.

Do you think we should instruct students to not do them in the normal flow of the lab, and only tackle them at the end? Could we ponder moving them to the end of the lab?

Additionally, I split the last iteration and passed the requirement to calculate the products diagonally to an extra iteration, ironhack-labs#8.1, since my current cohort found it significantly more complex to solve than horizontally and diagonally. Specs don't include any tests for the diagonal product.

I'm merging this the PR into master, but I think that it would be productive to follow up on this Lab and do some additional work on it.

Cheers!