node_modules/tap-mocha-reporter/lib/browser/escape-string-regexp.js

'use strict';

var matchOperatorsRe = /[|\\{}()[\]^$+*?.]/g;

module.exports = function (str) {
  if (typeof str !== 'string') {
    throw new TypeError('Expected a string');
  }

  return str.replace(matchOperatorsRe,  '\\$&');
};