Empty hash literal should be kept on one line

[maxnotarangelo]

Empty hash literals get expanded to multiple lines, which is hard to read. Empty arrays don't do this, which is (in my opinion) the correct behavior:

Original:

nested_with_empty_hash = {
 a: {
 b: {},
 c: [],
 d: [{}, stuff, [], other_stuff]
 }
}

After formatting:

nested_with_empty_hash = {
 a: {
 b: {
 },
 c: [],
 d: [{}, stuff, [], other_stuff]
 }
}