One of the nice things with A Book About Hype is that I can use it too. 
I was looking up how I did "localStorage", which is from the "Saving" section. So, I just cut-and-paste the code. After copying, I got the following error...
invalid character u8203
It looks like some invisible characters / extra characters went along for the ride...
If you see the line counter skipping rows, then there's probably something wrong. (In the image, there's a lot of space between lines 63 and 64.) Since I couldn't find the hidden characters, even after using "Zap Gremlins" in TextWrangler, I just retyped the section.
This bothered me. I found it to be so annoying that I'm thinking of making the templates available for download at Photics.com. I'm busy with "B.R.O.O.M." right now, but Im seriously thinking of installing https://easydigitaldownloads.com at my site and adding the templates.