报告 Set 上的 filter 或 filterNot 并建议改用 intersect 或 diff。

示例：

  val set = Set(1, 2)
  val others = Set(2, 3)
  set.filter(others.contains(_))
  set.filterNot(others.contains)
  set.filter(x => !others.contains(x))
  set.filterNot(x => !others.contains(x))

在应用快速修复后：

  val set = Set(1, 2)
  val others = Set(2, 3)
  set.intersect(others)
  set.diff(others)
  set.diff(others)
  set.intersect(others)