private wordwrap(m, b, c) {
            var i, j, l, s, r;
            if (m < 1)
                return m;
            for (i = -1, l = (r = m.split("\n")).length; ++i < l; r[i] += s)
                for (s = r[i], r[i] = ""; s.length > m; r[i] += s.slice(0, j) + ((s = s.slice(j)).length ? b : ""))
                    j = c == 2 || (j = s.slice(0, m + 1).match(/\S*(\s)?$/))[1] ? m : j.input.length - j[0].length
                        || c == 1 && m || j.input.length + (j = s.slice(m).match(/^\S*/)).input.length;
            return r.join("\n");
        }