CLI Book – Rolling Review – DO NOT MERGE

[killercup]

This pull request is not meant to ever be merged.

The book is written like this: New chapters will be added in PRs, where they get a bit of review, and finally get merged into master. Once they land in master, it's hard to leave review comments, though!

This PR is meant to give you a way to review the book and leave comments in an easy way. It shows the diff between master before I added the book and master right now, so it'll always show the full book, and also automatically mark comments as resolved once new content lands in master.

[killercup]

Thanks so much for the thorough review, @stjepang! This is amazing!

By the way, the book was easy to follow and I learned something new while reading it. I like how unintimidating it is and assumes little prior knowledge. Great job!

Thank you!

Also thank you, @Dylan-DPC, for making a PR that includes a huge bunch of the suggestions applied! <3

[killercup]

Pushed what I think is the rest of @stjepang's suggestions to master so it shows up here directly.

[pksunkara]

@epage Shall we close this?