[1]_
[2]_
[#]_
[#foobar]_
[CIT2002]_
foobar_
foo__
foo:bar_
`foo:bar`_
`foo bar baz`__
_`inline internal target`
----------------------------------------------------
[
["link", [["punctuation", "["], "1", ["punctuation", "]_"]]],
["link", [["punctuation", "["], "2", ["punctuation", "]_"]]],
["link", [["punctuation", "["], "#", ["punctuation", "]_"]]],
["link", [["punctuation", "["], "#foobar", ["punctuation", "]_"]]],
["link", [["punctuation", "["], "CIT2002", ["punctuation", "]_"]]],
["link", ["foobar", ["punctuation", "_"]]],
["link", ["foo", ["punctuation", "__"]]],
["link", ["foo:bar", ["punctuation", "_"]]],
["link", [["punctuation", "`"], "foo:bar", ["punctuation", "`_"]]],
["link", [["punctuation", "`"], "foo bar baz", ["punctuation", "`__"]]],
["link", [["punctuation", "_`"], "inline internal target", ["punctuation", "`"]]]
]
----------------------------------------------------
Checks for links.
