inconsistent formatting of nested arrow functions, when one of the function headers spans multiple lines

[adrian-gierakowski]

Describe the bug

dprint-plugin-typescript version: x.x.x

config:

{ "lineWidth": 80, "memberExpression.linePerExpression": true, "semiColons": "asi", "indentWidth": 2 }

Input Code

const func =  
  () =>
  (arg1: {
    a: number; 
    b: number;
  }) =>
  (arg2: { c: number }) =>
  (arg3: undefined): undefined => arg3

Expected Output

const func =  
  () =>
  (arg1: {
    a: number; 
    b: number;
  }) =>
  (arg2: { c: number }) =>
  (arg3: undefined): undefined => arg3

Actual Output

const func = () =>
  (arg1: {
    a: number
    b: number
  }) =>
  (arg2: { c: number }) =>
  (arg3: undefined): undefined => arg3

Notice the first arrow head not starting on it's own line.

If the second arrow header is put on a single line, the following is formatted correctly (unchanged):

const func =
  () =>
  (arg1: { a: number; b: number }) =>
  (arg2: { c: number }) =>
  (arg3: undefined): undefined => arg3

[adrian-gierakowski]

related to #755