Function wrap

test/parseJson.unittest.js:110–111

(/** @type {string} */ message, /** @type {string} */ txt)

	// Feed V8-shaped messages directly so the engine-specific text is fixed and the
	// transformation is checked the same way on V8 and JSC.
	const wrap = (/** @type {string} */ message, /** @type {string} */ txt) =>
		new JSONParseError(new SyntaxError(message), txt, txt);

	it("rewrites an unexpected token to include its char code", () => {
		const err = wrap("Unexpected token 'o', \"foo\" is not valid JSON", "foo");