.
+ -
/ * **
< > <= >=
= ?= <>

& &&

a-b
a~b
a->b
a=>b
a|b
a{b}c

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

[
	["punctuation", "."],
	["operator", "+"], ["operator", "-"],
	["operator", "/"], ["operator", "*"], ["operator", "**"],
	["operator", "<"], ["operator", ">"], ["operator", "<="], ["operator", ">="],
	["operator", "="], ["operator", "?="], ["operator", "<>"],

	["string-operator", "&"], ["string-operator", "&&"],

	"\r\n\r\na", ["token-operator", "-"],
	"b\r\na", ["token-operator", "~"],
	"b\r\na", ["token-operator", "->"],
	"b\r\na", ["token-operator", "=>"],
	"b\r\na", ["token-operator", "|"],
	"b\r\na", ["token-operator", "{"], "b", ["token-operator", "}"], "c"
]

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

Checks for operators, string-operators and token-operators.
The leading dot serves only because tests are trimmed.