Is your feature request related to a problem? Please describe.
Currently, expressions are indented just one more indentation level after a guard, which makes me confuse the guard from the expression. e.g.

foo mx
  | Foo x <- mx = do
    Foo x' <- bar x
    return x'
  | otherwise = do
    putStrLn "hello"
    putStrLn "world"

When I look at this, my eyes glaze over the | and just see 6 lines at the same indentation level.

Describe the solution you'd like
I think it's less confusing for it to be indented one more, e.g.

foo mx
  | Foo x <- mx = do
      Foo x' <- bar x
      return x'
  | otherwise = do
      putStrLn "hello"
      putStrLn "world"

To me, this is much clearer, as it clearly separates the guard from the expression. I can clearly see two guards, with two lines of expression each, whereas before, I saw 6 lines of guards/expressions?

Describe alternatives you've considered

Additional context