""
"Foo
\"bar\"
baz"
''
'Foo
\'bar\'
baz'
'$bar ${4+2}'
'The sum of $x and 3 is ${x + 3}'

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

[
	["string", "\"\""],
	["string", "\"Foo\r\n\\\"bar\\\"\r\nbaz\""],
	["string-interpolation", [
		["string", "''"]
	]],
	["string-interpolation", [
		["string", "'Foo\r\n\\'bar\\'\r\nbaz'"]
	]],
	["string-interpolation", [
		["string", "'"],
		["interpolation", [
			["interpolation-punctuation", "$"],
			["expression", ["bar"]]
		]],
		["string", " "],
		["interpolation", [
			["interpolation-punctuation", "${"],
			["expression", [
				["number", "4"],
				["operator", "+"],
				["number", "2"]
			]],
			["interpolation-punctuation", "}"]
		]],
		["string", "'"]
	]],
	["string-interpolation", [
		["string", "'The sum of "],
		["interpolation", [
			["interpolation-punctuation", "$"],
			["expression", ["x"]]
		]],
		["string", " and 3 is "],
		["interpolation", [
			["interpolation-punctuation", "${"],
			["expression", [
				"x ",
				["operator", "+"],
				["number", "3"]
			]],
			["interpolation-punctuation", "}"]
		]],
		["string", "'"]
	]]
]

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

Checks for strings and string interpolation.
