0 HEAD
1 CHAR ASCII
99 FOO bar

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

[
	["level", "0"],
	["tag", "HEAD"],
	["level", "1"],
	["tag", "CHAR"],
	["line-value", ["ASCII"]],
	["level", "99"],
	["tag", "FOO"],
	["line-value", ["bar"]]
]

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

Checks for levels.