Text.PrettyPrint bug or doc bug

Hello, The documentation for Text.PrettyPrint.HughesPJ states that vcat is the "List version of $$", but it works as the list version ($+$). In the source code, this is because vcat = reduceAB . foldr (above_' True) empty instead of vcat = reduceAB . foldr (above_' False) empty So either the documentation needs to be changed or the code. It would be nice to have both versions. Cheers, - Marcus