spawn(
foo@_bar(
'foo bar'(
'\'\\'(

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

[
	["function", "spawn"], ["punctuation", "("],
	["function", "foo@_bar"], ["punctuation", "("],
	["quoted-function", "'foo bar'"], ["punctuation", "("],
	["quoted-function", "'\\'\\\\'"], ["punctuation", "("]
]

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Checks for functions and quoted functions.