#{ 42 }
#{ "foobar" }

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

[
	["interpolation", [
		["delimiter", "#{"],
		["number", "42"],
		["delimiter", "}"]
	]],
	["interpolation", [
		["delimiter", "#{"],
		["string", ["\"foobar\""]],
		["delimiter", "}"]
	]]
]

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

Checks for interpolation in plain text.