I have never seen a Haskell dev do this.

Which shows what most people prefer. None the less your concern is more than valid and a real problem. My suggestion would be that the interpreters/compilers of white-space sensitive languages should implement the beautifying operation and call it before code is executed and editors should use this function. We can't expect to not adapt editors to different code styles.

Simon Peyton Jones, one of the driving forces behind GHC, uses braces.