Changes Process string argument to an array
use Symfony\Component\Process\Process;
-$process = new Process('ls -l');
+$process = new Process(['ls', '-l']);Configure your rector.php:
<?php
use Rector\Config\RectorConfig;
use Rector\Symfony\Symfony42\Rector\New_\StringToArrayArgumentProcessRector;
return RectorConfig::configure()
->withRules([
StringToArrayArgumentProcessRector::class,
]);