>>>
class A {
  A(
    int a,
  )
      : super();
}
<<<
class A {
  A(
    int a,
  ) : super();
}
>>>
class Foo {
  Foo({
    Bar bar,
    Baz baz,
  })
      : assert(bar != null),
        super(baz);
}
<<<
class Foo {
  Foo({
    Bar bar,
    Baz baz,
  })  : assert(bar != null),
        super(baz);
}