PHPCSStandards / PHP_CodeSniffer / 8583233066

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PSR2/ClassDeclaration: bug fix - prevent fixer conflict

Yet another one in the fixer conflict series.

When running the `Squiz` standard over all test case files, a fixer conflict between the `Squiz.Classes.ClassDeclaration`, which extends the `PSR2.Classes.ClassDeclaration` sniff, and the `Squiz.Commenting.InlineComment` sniff was discovered via the tests in the `tests\Core\Tokenizer\UndoNamespacedNameSingleTokenTest.inc` file for a code sample like this:
```php
class MyClass
    /* testExtendedFQN */
    extends \Vendor\Level\FQN
    /* testImplementsRelative */
    implements namespace\Name,
        /* testImplementsFQN */
        \Fully\Qualified,
        /* testImplementsUnqualified */
        Unqualified,
        /* testImplementsPartiallyQualified */
        Sub\Level\Name
{}
```

The conflict essentially comes down to the `PSR2.Classes.ClassDeclaration` sniff adding a new line between an inline comment (which is already on its own line) and the name of an interface being implemented, which the `Squiz.Commenting.InlineComment` sniff would then remove again.

Isolating the code sample even further, the conflict can be reproduced even without the `Squiz.Commenting.InlineComment` sniff.

The short of it was, that the `PSR2.Classes.ClassDeclaration` sniff did not take into account that there could be comments between the interface names in a multi-line `implements` and would then get its knickers in a twist.

Original errors for the code sample added in the test case file:
```
 302 | ERROR | [x] Only one interface may be specified per line in a multi-line implements declaration
     |       |     (PSR2.Classes.ClassDeclaration.InterfaceSameLine)
 310 | ERROR | [x] Only one interface may be specified per line in a multi-line implements declaration
     |       |     (PSR2.Classes.ClassDeclaration.InterfaceSameLine)
 316 | ERROR | [x] Only one interface may be specified per line in a multi-line implements declaration
     |       |     (PSR2.Classes... (continued)

4 of 4 new or added lines in 1 file covered. (100.0%)

17360 of 23993 relevant lines covered (72.35%)

55.29 hits per line