Ch.33 Mystereous `execute`

Isn't execute "normal! <v>y" the same as normal! <v>y here?
so it's no need to use execute. Comparing to the following sections of the page, execute is not used in the same code but why it's disappeared is not mentioned. Did you forget to mention about removing execute or it was just a typo to include it?
Correct me if I am wrong, I am just learning vimscript using your book, but I've mentioned that sometimes very minor inconsistencies in code snippets appear. Eagerly willing to assist in improving the document.