Incorrect scope of comments after formatting in enum and struct

[CAIMEO]

Before:

pub enum T {
  A(@immutable_vec.ImmutableVec[T])
  /// Comment
}

After:

pub enum T {
  A(@immutable_vec.ImmutableVec[T])
}
/// Comment

This also happens in struct in which the field contains @.

[Hongbo Zhang]

fixed

[Yorkin]

fixed