minor #6566 Update options_resolver.rst (snake77se)

This PR was submitted for the 2.8 branch but it was merged into the 2.7 branch instead (closes #6566).

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Update options_resolver.rst

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0bc1cc7 Update options_resolver.rst

Author: xabbuh

components/options_resolver.rst

@@ -403,12 +403,11 @@ is thrown::
 For options with more complicated validation schemes, pass a closure which
 returns ``true`` for acceptable values and ``false`` for invalid values::
 
-    $resolver->setAllowedValues(array(
-        // ...
-        $resolver->setAllowedValues('transport', function ($value) {
-            // return true or false
-        });
-    ));
+    
+      // ...
+      $resolver->setAllowedValues('transport', function ($value) {
+          // return true or false
+      });
 
 In sub-classes, you can use :method:`Symfony\\Component\\OptionsResolver\\OptionsResolver::addAllowedValues`
 to add additional allowed values without erasing the ones already set.