[a: 1, b: 2]
do: :this, else: :that
where: foo,
select: bar

----------------------------------------------------

[
	["punctuation", "["],
	["attr-name", "a:"],
	["number", "1"], ["punctuation", ","],
	["attr-name", "b:"],
	["number", "2"], ["punctuation", "]"],

	["attr-name", "do:"], ["atom", ":this"],
	["punctuation", ","],
	["attr-name", "else:"], ["atom", ":that"],
	["attr-name", "where:"], " foo", ["punctuation", ","],
	["attr-name", "select:"], " bar"
]

----------------------------------------------------

Checks for keyword list keys.