code: function help() {
    return (
      [
        '',
        'Usage: ' + pack.name + ' [options] <words...>',
        '',
        pack.description,
        '',
        'Options:',
        '',
        '  -h, --help           output usage information',
        '  -v, --version        output version number',
        '',
        'Usage:',
        '',
        '# output stemmerality',
        '$ ' + pack.name + ' @',
        '# ' + stemmer('@'),
        '',
        '# output stemmerality from stdin',
        "$ echo 'الانجليزية' | " + pack.name,
        '# ' + stemmer('الانجليزية')
      ].join('\n  ') + '\n'
    )
  }
docs: /* Help.