Reports anonymous functions that can be eta expanded and also reports placeholders that can be removed from eta-expansions.
Example:
def f(x: Any, y: Int): Unit = ()
val x = f(_, _)
val y: (Int, Int) => Unit = f _
After the quick-fix is applied:
def f(x: Any, y: Int): Unit = ()
val x = f _
val y: (Int, Int) => Unit = f