Whatever symbols you're seeing in RWH that aren't on that wiki page are probably functions, not keywords. For functions, you should use Hoogle. For better or w

Whatever symbols you're seeing in RWH that aren't on that wiki page are probably functions, not keywords. For functions, you should use Hoogle. For better or worse, there will never be a complete list of infix functions for Haskell because new infix functions can be defined by the user.