bug #39936 [Validator] Fix DebugCommand (loic425)

This PR was squashed before being merged into the 5.2 branch.

Discussion
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[Validator] Fix DebugCommand

| Q             | A
| ------------- | ---
| Branch?       | 5.2
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       |
| License       | MIT
| Doc PR        |
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Commits
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1eb13767fc [Validator] Fix DebugCommand

src/Symfony/Component/Validator/Command/DebugCommand.php

@@ -181,7 +181,7 @@ EOF
 
             $namespace = $matches[1] ?? null;
 
-            if (false === preg_match('/class +([^{ ]+)/', $fileContent, $matches)) {
+            if (!preg_match('/class +([^{ ]+)/', $fileContent, $matches)) {
                 // no class found
                 continue;
             }

src/Symfony/Component/Validator/Tests/Dummy/TraitPass.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace Symfony\Component\Validator\Tests\Dummy;
+
+trait TraitPass
+{
+}