fix: retrait du slash fermant des balises html

ecrire/base/repair.php

ecrire/base/upgrade.php

ecrire/exec/admin_plugin.php

ecrire/exec/fond.php

ecrire/exec/rechercher.php

ecrire/exec/upgrade.php

ecrire/genie/maintenance.php

ecrire/inc/admin.php

ecrire/inc/auth.php

ecrire/inc/chercher_rubrique.php

ecrire/inc/cvt_configurer.php

ecrire/inc/documents.php

ecrire/inc/editer.php

ecrire/inc/filtres.php

ecrire/inc/filtres_images_lib_mini.php

ecrire/inc/filtres_images_mini.php

ecrire/inc/headers.php

ecrire/inc/install.php

ecrire/inc/math.php

ecrire/inc/plugin.php