This file is indexed.

/usr/lib/nodejs/ansi-regex/index.js is in node-ansi-regex 3.0.0-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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'use strict';

module.exports = () => {
	const pattern = [
		'[\\u001B\\u009B][[\\]()#;?]*(?:(?:(?:[a-zA-Z\\d]*(?:;[a-zA-Z\\d]*)*)?\\u0007)',
		'(?:(?:\\d{1,4}(?:;\\d{0,4})*)?[\\dA-PRZcf-ntqry=><~]))'
	].join('|');

	return new RegExp(pattern, 'g');
};