Merge branch '6.0' into 6.1

* 6.0:
  Fix CS

Author: fabpot

Tests/FunctionsTest.php

@@ -14,12 +14,13 @@
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\String\AbstractString;
 use Symfony\Component\String\ByteString;
-use Symfony\Component\String\UnicodeString;
 
 use function Symfony\Component\String\b;
 use function Symfony\Component\String\s;
 use function Symfony\Component\String\u;
 
+use Symfony\Component\String\UnicodeString;
+
 final class FunctionsTest extends TestCase
 {
     /**