// Allow after '[' and ',', and before ']'.
var list = [
"a",
"b"
]
System.print(list[0]) // expect: a
System.print(list[1]) // expect: b
// Newline after trailing comma.
list = ["c",
]
System.print(list[0]) // expect: c
// Newline in empty list.
list = [
]
System.print(list.count) // expect: 0