What do you think is wordy? It's detailed, but as an occasional editor, I'm not seeing much wordiness. It also makes good use of headers and bolding so readers can skim and skip if they want.

There's definitely imagery, history, and definitions that technically could be cut, but the guidelines would be poorer for it—especially for people with less familiarity with the commandline. I do think they should consider releasing a cheat sheet alongside the full document with just the bolded guidelines.