foo=Bar Baz
foobar=42

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

[
	["constant", "foo"],
	["attr-value", [
		["punctuation", "="],
		"Bar Baz"
	]],
	["constant", "foobar"],
	["attr-value", [
		["punctuation", "="],
		"42"
	]]
]

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

Checks for key/value pairs.