Tabs in haskell

tabs.8.hs

main = do
	let	x = "123"
		y = "456"
		in putStrLn (x ++ y)

{-
Simple example in haskell.

This works (tabs=8)

main = do
	let	x = "123"
		y = "456"
		in putStrLn (x ++ y)

This wont (tabs=4, replaces with spaces to show result)
main = do
    let    x = "123"
        y = "456"
        in putStrLn (x ++ y)

This is how it would look with spaces for alignment

main = do
       let x = "123"
           y = "456"
           in putStrLn (x ++ y)

---
Strictly speaking that's not 100% accurate, because the haskell compiler will assume tabs = 8.
But if you editor has tabs = 4 then you need to write what looks like syntactically invalid haskell
for it to be correct. Meaning that you would almost certainly write what appeared to be valid code but would
be syntactically invalid
-}