minor #10447 [Config][Loader] Code style fix (kdauzickas)

This PR was submitted for the 2.3-dev branch but it was merged into the 2.3 branch instead (closes #10447).

Discussion
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[Config][Loader] Code style fix

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
-------

6d84c04 Minor style fix

src/Symfony/Component/Config/Loader/DelegatingLoader.php

@@ -57,6 +57,6 @@ class DelegatingLoader extends Loader
      */
     public function supports($resource, $type = null)
     {
-        return false === $this->resolver->resolve($resource, $type) ? false : true;
+        return false !== $this->resolver->resolve($resource, $type);
     }
 }