docs: function logs(a) {
    return a.isIgnored?         ''
    :      a.log.length === 0?  ''
    :      /* otherwise */      '\n' + pad( 2
                                          , '=== Captured logs:\n'
                                          + a.log.map(function(x){
                                              return faded('- ' + show(x.log))})
                                            .join('\n') + '\n---\n')
  }