Don’t use command line tools where they can be avoided. Yes, they’re quicker, and yes, they’re often easier. But it’s also much easier to mistype or use a wrong command – even if (often precisely because!) you’re copy-pasting from somebody else. Remember: You’re not just messing about with your own site – many other users are depending on you too.
I am all about making documentation useful to the most people possible, but that has to be one of the most absurd ideas I’ve read. I am a self-taught web developer; if I had followed that advice I wouldn’t know how to use any of the tools I use daily. Nonsense.