Describe the bug

If I use Squiz.Arrays.ArrayDeclaration.NoCommaAfterLast rule with this kind of array below, then the first array will be treated as a multi-line array, and this rule will expect a comma between arrays end tokens.

Code sample

1. Test code:

$a = [[
 1,
 2,
]];

2. With Squiz.Arrays.ArrayDeclaration.NoCommaAfterLast rule, this code is expected:

$a = [[
 1,
 2,
],];

Ruleset

<?xml version="1.0"?>
<ruleset name="My Custom Standard">
 <rule ref="Squiz.Arrays.ArrayDeclaration.NoCommaAfterLast"/>
</ruleset>

To reproduce

Steps to reproduce the behavior:

1. Create a file called test.php with the test code above.
2. Run phpcs test.php or phpcbf test.php
3. See that a comma is expected line 4, between both arrays end tokens.
   PHPCS output : ERROR | [x] Comma required after last value in array declaration

Expected behavior

The first array should not be detected as multi-line.

Versions (please complete the following information)

Addtitional information

In the code, the condition deciding if an array is single or multi-line is at the end of ArrayDeclarationSniff::process:

Please confirm

• I have searched the issue list and am not opening a duplicate issue.
• I have read the Contribution Guidelines and this is not a support question.
• I confirm that this bug is a bug in PHP_CodeSniffer and not in one of the external standards.
• I have verified the issue still exists in the 4.x branch of PHP_CodeSniffer.