[DowngradePhp73] Fix complex next arg on DowngradeTrailingCommasInFunctionCallsRector

Author: samsonasik

rules/DowngradePhp73/Rector/FuncCall/DowngradeTrailingCommasInFunctionCallsRector.php

@@ -94,6 +94,7 @@ public function refactor(Node $node): ?Node
 
         while (isset($tokens[$args[$lastArgKey]->getEndTokenPos() + $iteration])) {
             if (trim($tokens[$args[$lastArgKey]->getEndTokenPos() + $iteration]->text) === '') {
+                ++$iteration;
                 continue;
             }