Thought I'd have a play with a bleeding edge pre alpha 4 development snapshot of Drupal 8. I hit a minor documentation/installation snag. This is probably frustrating for people, so I'm documenting it here in order to later find the right place, right person, right way to report it, and perhaps improve it.
I've nearly finished installing D8! Yay. Now I'm at the "Configure site" stage where I get this helpful message suggesting I ought to consult the "online handbook."