Default Branch for Exercise?

[trungnd19]

Hello Miller, recently I read your book and found it particular helpful for expanding my testing knowledge. And I really like the fact that at the end of each chapter there are exercises to practice writing some codes.

But as I browsed through the repo, I only found the final source code and solution on master branch. Is there any branch that only has the initial code as in the book so that your readers can start doing the exercises right away without having to look at solution beforehand?