~~ trailingCommas: maintain ~~
== should maintain when has ==
{
  "testing": 123,
  "prop": [
    1,
    2,
    3,
  ],
}

[expect]
{
  "testing": 123,
  "prop": [
    1,
    2,
    3,
  ],
}

== should maintain when has not ==
{
  "testing": 123,
  "prop": [
    1,
    2,
    3
  ]
}

[expect]
{
  "testing": 123,
  "prop": [
    1,
    2,
    3
  ]
}