PHPCS: require `declare(strict_types=1);`
>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3572777. --> Reported by: [wim leers](https://www.drupal.org/user/99777) Related to !579 >>> <h3 id="overview">Overview</h3> <p>We keep having to say this in MR reviews manually. Just now, an MR landed that didn't do this: <a href="https://git.drupalcode.org/project/canvas/-/merge_requests/515/diffs#note_677314">https://git.drupalcode.org/project/canvas/-/merge_requests/515/diffs#note_677314</a>, for <span class="drupalorg-gitlab-issue-link drupalorg-gitlab-link-wrapper"><a href="https://git.drupalcode.org/project/canvas/-/work_items/3553356" class="drupalorg-gitlab-link">https://git.drupalcode.org/project/canvas/-/work_items/3553356</a></span>.</p> <h3 id="proposed-resolution">Proposed resolution</h3> <p>Automate this feedback.</p> <h3 id="ui-changes">User interface changes</h3>
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