Formatting suggestion: Keep desired line breaks

For list, function signatures, etc If I add a line break I would like the formatter to respect that and not try to join lines.

Examples:

let a = [
  1,
  2,
  3,
]

I would prefer the formatter not to make convert this to

let a = [1, 2, 3]

Function signatures:

pub fn tuple2(
  codec_a: Codec(a),
  codec_b: Codec(b),
 ) -> Codec(#(a, b)) {

The formatter changes this to

pub fn tuple2(codec_a: Codec(a), codec_b: Codec(b)) -> Codec(#(a, b)) {

Why?

Having items in different lines makes less git diff noise.
Each time I add or substract items the formatting can change radically (joining or splitting lines). Making a lot of diff noise.
In many cases is easier to read when there are line breaks (like in the function signature example above)