code: function withCmdPrefix(state)
  {
    var prefix;
  
    if (state.options && state.options.cmdPrefix)
    {
      prefix = ' with ``' + state.options.cmdPrefix + '`` prefix';
    }
  
    return prefix || '';
  }
docs: Generates command prefix line
  
  @param   {object} state - current state
  @returns {string} - prefix line or empty string