Thanks for letting me know - I have edited the post to correct it.
On most keyboards (QWERTY, Dvorak, etc.) vertical bar is produced using SHIFT + ‘\’, i.e. depressing the SHIFT key and the BACKSLASH key concurrently, though this is often shown as a BROKEN VERTICAL BAR on the key itself. Sorry, I come from a mainly Linux background where the pipe symbol ‘|’ is second nature to me.
I’ll have a look into this. I have changed it several times since I first started and making it a parameter shouldn’t be too much work.
I am more than happy to get suggestions like this. I kind of rushed the making of the tutorial as I wanted to get the feature published as soon as I could. I had to cut out quite a few mis-types and will look at improving it now that it is published.