minor #14090 CS: Unary operators should be placed adjacent to their operands (keradus)

This PR was merged into the 2.3 branch.

Discussion
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CS: Unary operators should be placed adjacent to their operands

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

Update before upcoming changes on PHP CS Fixer 1.7

To keep fabbot.io happy ;)

Commits
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2367f4a CS: Unary operators should be placed adjacent to their operands

Author: fabpot

Form/Type/DoctrineType.php

@@ -60,7 +60,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
 
     public function setDefaultOptions(OptionsResolverInterface $resolver)
     {
-        $choiceListCache = & $this->choiceListCache;
+        $choiceListCache = &$this->choiceListCache;
         $registry = $this->registry;
         $propertyAccessor = $this->propertyAccessor;
         $type = $this;