// @author NoName <tz4678@gmail.com>
// wordWrap(s, width=78)
function wordWrap(s, width) {
  width = width || 78
  var r = '(?:(.{1,' + width + '})[ \\t\\r]+|(.{' + width + '}))(?!$)';
  r = new RegExp(r, 'g');
  return s.replace(r, '$1$2\n');
}