Undefined offset notice in ScopeIndentSniff

When I do a coding standards check on the following CTools plugin declaration file:

/**
 * @file
 * Plugin declaration for the active business selection plugin.
 */

$plugin = array(
  'title' => t('Filter on active business'),
  'class' => 'EntityReference_SelectionHandler_Active_Business',
);

I'm getting the following notice:

Notice: Undefined offset: 47 in vendor/drupal/coder/coder_sniffer/Drupal/Sniffs/WhiteSpace/ScopeIndentSniff.php on line 205