""
"foobar"
"fo:"o"
"foo:)bar:>baz"
"foo:{bar}baz"

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

[
	["string", ["\"\""]],
	["string", ["\"foobar\""]],
	["string", [
		"\"fo",
		["symbol", ":\""],
		"o\""
	]],
	["string", [
		"\"foo",
		["symbol", ":)"],
		"bar",
		["symbol", ":>"],
		"baz\""
	]],
	["string", [
		"\"foo",
		["variable", ":{bar}"],
		"baz\""
	]]
]

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

Checks for strings, with variables and symbols in them.