Unparseable output with \cases and multiple patterns across multiple lines

[amesgen]

Describe the bug
With --unsafe, this snippet (typechecks fine)

foo = \cases
  True
   True -> True
  _ _ -> False

is formatted to

foo = \cases
  True
  True -> True
  _ _ -> False

which fails to parse with

<input>:3:3
  Parsing of formatted code failed:
  [GHC-58481] parse error (possibly incorrect indentation or mismatched brackets)

Expected behavior
It should be formatted correctly, using identation for subsequent patterns:

foo = \cases
  True
    True -> True
  _ _ -> False

Environment
Happens using Ormolu 0.6.0.1 and current master (8f2bc36)