Question about page 297: Chapter 4.9, Exercise 8

[MetallicCrimson]

Technically it's possible to make such a graph only with parallel edges (and no loops), and only with loops (and no parallel edges). I'd update

parallel edges and self-loops are required to make this happen

to

parallel edges or self-loops are required to make this happen

Do you think it's worth it? To be fair, it's such a small update it doesn't matter much even if it stays this way.

[spamegg1]

I'll remove the whole statement I think.