code: function isFoundIn (str) {
    str = stripUrls(str)
    return function find (searchfor) {
      if (searchfor instanceof RegExp) return searchfor.test(str)
      else if (typeof searchfor === 'function') return searchfor(str)
      else return str && str.indexOf(searchfor) >= 0
    }
  }
docs: /*
  str: string to search in.
  searchfor: string or pattern to search for.