Yeah, that doesn't give high hopes for this book teaching best practices :/ If you don't want to depend on text-icu, there is support for more Unicode space ch

Yeah, that doesn't give high hopes for this book teaching best practices :/ If you don't want to depend on text-icu, there is support for more Unicode space characters in https://hackage.haskell.org/package/base-4.8.2.0/docs/Data-Char.html#v:isSpace https://hackage.haskell.org/package/base-4.8.2.0/docs/Data-C... import Data.Char (isAlpha, isLower, isSpace) import qualified Data.Text as T giving you e.g. textIsAllSpace t = T.all isSpace t