SquareBraceTransformer - fix detect array destructing in foreach

[SpacePossum]

closes #6062

[coveralls]

Coverage increased (+0.0007%) to 92.82% when pulling b2bee6b on SpacePossum:6062 into 39192f5 on FriendsOfPHP:master.

[jacekciach]

@SpacePossum I've checked out the branch: the fix works.

$ ./php-cs-fixer fix --dry-run -vvv --diff --using-cache=no --config=../php-cs-fixer-bug/.php-cs-fixer.dist.php ../php-cs-fixer-bug/testcase/
PHP CS Fixer 3.2.2-DEV by Fabien Potencier and Dariusz Ruminski
Runtime: PHP 7.2.18
Loaded config default from "../php-cs-fixer-bug/.php-cs-fixer.dist.php".
Paths from configuration file have been overridden by paths provided as command arguments.
F                                                                                                                                                       1 / 1 (100%)
Legend: ?-unknown, I-invalid file syntax (file ignored), S-skipped (cached or empty file), .-no changes, F-fixed, E-error
   1) php-cs-fixer-bug/testcase/test.php (list_syntax)
      ---------- begin diff ----------
--- /home/jciach/php/php-cs-fixer-bug/testcase/test.php
+++ /home/jciach/php/php-cs-fixer-bug/testcase/test.php
@@ -1,27 +1,27 @@
 <?php
 
-foreach ($iterable as [
+foreach ($iterable as list(
     'a' => $a,
     'b' => $b,
-]) {
+)) {
     // do something
 }
 
-foreach ($iterable as [
+foreach ($iterable as list(
     $a,
     $b,
-]) {
+)) {
     // do something
 }
 
 $result = $pdo->query("SELECT id, name FROM employees");
-while ([$id, $name] = $result->fetch(PDO::FETCH_NUM)) {
+while (list($id, $name) = $result->fetch(PDO::FETCH_NUM)) {
     echo "id: $id, name: $name\n";
 }
 
-[$a, $b] = $array;
+list($a, $b) = $array;
 
-[
+list(
     $a,
     $b,
-] = $array;
+) = $array;

      ----------- end diff -----------


Checked all files in 0.068 seconds, 12.000 MB memory used