Fix PHPCS coding standards checks on CI
>>> [!note] Migrated issue
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Reported by: [phenaproxima](https://www.drupal.org/user/205645)
Related to !17
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<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>Our CI jobs have an allowed-failure for PHPCS -- it detects very minor coding standards defects: <a href="https://git.drupalcode.org/project/mercury/-/jobs/6242496">https://git.drupalcode.org/project/mercury/-/jobs/6242496</a></p>
<p>Let's fix these so that our CI jobs can be completely and fully green. It's a nice feeling and gives us confidence in the code quality.</p>
issue