Exercise 5.4 does not reinforce the section it's in

[arencambre]

It is customary that exercises within a section reinforce something about that section.

Exercise 5.4's placement, at the end of section 5.5.2, means it should reinforce 5.5.2 (factors) or section 5.5 (classes). However, this exercise illustrates nothing about factors or classes. Rather, it is rather an introduction to section 5.6, which is about coercion.

Options for fixing:

• Change it into a demonstration in section 5.6.
• (less preferred because it's unclean) Add a disclaimer to the top of exercise 5.4 to explain why it isn't about sections 5.5 or 5.5.2.

[arencambre]

I could take care of this and some other issues if you want. Do you prefer pull requests or should I be a contributor? (Check my LinkedIn profile for qualifications.)