[bug] `Format Document` in VSCode fails to properly handle line comments for enum

[sv158]

before:

enum W {
  A /// apple
  B /// berry
}

after format:

enum W {
  /// apple
  /// berry
  A 
  B 
}

---

another case:

enum W {
  A /// apple

  B /// berry
}

this works after format:

enum W {
  /// apple
  A 
  /// berry
  B 
}