reverted change introduced in a7c164e228e1 -- there cannot be a "bug" in a perfectly normal operation on the internal data representation that merely escaped into public by accident (cf. 0a981c596372);
By chapter:
chapters 1 and 2, maybe 3: Peter White
chapters 6, 7 and 8: David von Oheim
chapter 6, maybe 8: Gerwin Klein
chapters 3, maybe 4: Tanja Vos
chapters 1-3 at least: Stefano Bistarelli