[Translation] add tests + fix

Extractor/Visitor/AbstractVisitor.php

@@ -48,17 +48,11 @@ protected function getStringArguments(Node\Expr\CallLike|Node\Attribute|Node\Exp
 
         $args = $node instanceof Node\Expr\CallLike ? $node->getRawArgs() : $node->args;
 
-        if (\count($args) < $index) {
+        if (!($arg = $args[$index] ?? null) instanceof Node\Arg) {
             return [];
         }
 
-        if (($arg = $args[$index]) instanceof Node\Arg) {
-            if ($result = $this->getStringValue($arg->value)) {
-                return [$result];
-            }
-        }
-
-        return [];
+        return (array) $this->getStringValue($arg->value);
     }
 
     protected function hasNodeNamedArguments(Node\Expr\CallLike|Node\Attribute|Node\Expr\New_ $node): bool

Tests/fixtures/extractor-ast/translation.html.php

@@ -54,3 +54,5 @@
 <?php echo $view['translator']->trans('variable-assignation-inlined-in-trans-method-call3', [], $domain = 'not_messages'); ?>
 
 <?php echo $view['translator']->trans(domain: $domain = 'not_messages', message: $key = 'variable-assignation-inlined-with-named-arguments-in-trans-method', parameters: $parameters = []); ?>
+
+<?php echo $view['translator']->trans(...); // should not fail ?>