minor symfony#53881 [VarDumper] fix test (xabbuh)

This PR was merged into the 6.4 branch.

Discussion
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[VarDumper] fix test

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        |
| License       | MIT

Commits
-------

7b5366e fix test

Author: nicolas-grekas

src/Symfony/Component/VarDumper/Tests/Dumper/CliDumperTest.php

@@ -12,6 +12,7 @@
 namespace Symfony\Component\VarDumper\Tests\Dumper;
 
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\ErrorHandler\ErrorRenderer\FileLinkFormatter;
 use Symfony\Component\VarDumper\Caster\ClassStub;
 use Symfony\Component\VarDumper\Caster\CutStub;
 use Symfony\Component\VarDumper\Cloner\Data;
@@ -503,6 +504,10 @@ public function testCollapse()
 
     public function testFileLinkFormat()
     {
+        if (!class_exists(FileLinkFormatter::class)) {
+            $this->markTestSkipped(sprintf('Class "%s" is required to run this test.', FileLinkFormatter::class));
+        }
+
         $data = new Data([
             [
                 new ClassStub(self::class),