<Läufer>foo</Läufer>
<tag läufer="läufer">
<läufer:tag>baz</läufer:tag>

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

[
	["tag", [
		["tag", [
			["punctuation", "<"],
			"Läufer"
		]],
		["punctuation", ">"]
	]],
	"foo",
	["tag", [
		["tag", [
			["punctuation", "</"],
			"Läufer"
		]],
		["punctuation", ">"]
	]],

	["tag", [
        ["tag", [
            ["punctuation", "<"],
            "tag"
        ]],
        ["attr-name", [
            "läufer"
        ]],
        ["attr-value", [
            ["punctuation", "="],
            ["punctuation", "\""],
            "läufer",
            ["punctuation", "\""]
        ]],
        ["punctuation", ">"]
    ]],

    ["tag", [
		["tag", [
			["punctuation", "<"],
			["namespace", "läufer:"],
			"tag"
		]],
		["punctuation", ">"]
	]],
	"baz",
	["tag", [
		["tag", [
			["punctuation", "</"],
			["namespace", "läufer:"],
			"tag"
		]],
		["punctuation", ">"]
	]]
]

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

Checks for tags, attributes and namespaces containing unicode characters.
See #585 for details.