add newline between member methods.

[jiqimaogou]

class A {
   void hello() {
   }
   void world() {
   }
}

to

class A {
   void hello() {
   }

   void world() {
   }
}

[munificent]

The formatter will place a blank line between member declarations if they have a non-empty body. So in the example here, it doesn't, but if you change it to:

class A {
   void hello() {;
   }
   void world() {;
   }
}

Then it gives you:

class A {
  void hello() {
    ;
  }

  void world() {
    ;
  }
}