ubuntu-restricted-extras requires multiverse not restricted

I am reading ubuntu-manual rev 729, and on page 144 (Chapter 9), I believe I have discovered a factual error.

The "I can't play certain audio or video files" section states that to install ubuntu-restricted-extras, the universe and restricted repositories must be enabled; however, the ubuntu-restricted-extras package actually depends on packages in (and itself exists in) universe and multiverse, not universe and restricted.