style: PSR sur ecrire/tests suite à utilisation de Rector

ecrire/tests/legacy/unit/entrees_sorties/spip_nfslock.php

ecrire/tests/legacy/unit/filtres/affdate.php

ecrire/tests/legacy/unit/filtres/attribut_html.php

ecrire/tests/legacy/unit/filtres/date_iso.php

ecrire/tests/legacy/unit/filtres/entites_html.php

ecrire/tests/legacy/unit/filtres/extraire_attribut.php

ecrire/tests/legacy/unit/filtres/liens_absolus.php

ecrire/tests/legacy/unit/filtres/liens_absolus_prive.php

ecrire/tests/legacy/unit/filtres/suivre_liens.php

ecrire/tests/legacy/unit/path/creer_chemin.php

ecrire/tests/legacy/unit/plugin/dir_plugins_suppl.php

ecrire/tests/legacy/unit/propre/liens.php

ecrire/tests/legacy/unit/propre/liens_classes.php

ecrire/tests/legacy/unit/xml/xmlhack_recuperer_fond.php

ecrire/tests/legacy/unit/z_todo/NA_email_valide.php

ecrire/tests/legacy/unit/z_todo/NA_email_valide_5322.php