putStrLn "-- testing ghci multiline commands :{ .. :}"
putStrLn "-- via stdin"
:{
  let
  { f 0 = 1
  ; f 1 = w
    where { w = 2 }
  ; y = 3
  }
:}
print (f 0,f 1,y)

putStrLn "-- layout rule instead of explicit braces and semicolons works too"
:{
  let
   g 0 = 1
   g 1 = w
    where w = 2
   z = 3
:}
print (g 0,g 1,z)

:{
:browse
  Data.Maybe
:}
putStrLn "-- via readFile"
:cmd readFile "ghci023.ghci"