CSV export problem column line delimiter

Hello !
At each update of the plugin, we must repeat the manipulation on the following file:
I add delimiter…

/www/wp-content/plugins/contact-form-cfdb7/inc
> export-csv.php

– public function array2csv(array &$array, $df){
$delimiter = ‘;’;
if (count($array) == 0) {
return null;
}
– fputcsv( $df, $heading, $delimiter );
– fputcsv($df, $line_values, $delimiter);`

Otherwise the export is completely distorted because all the information is put on the same line… Do you have an explanation for this?

Hope you can help me ??
Best regards,

Romain