Fix: Problème sur les substitutions en mode tests mailing

htdocs/adherents/card_subscriptions.php

htdocs/adherents/cotisations.php

htdocs/admin/adherent.php

htdocs/admin/fckeditor.php

htdocs/comm/mailing/fiche.php

htdocs/conf/conf.class.php

htdocs/html.formmail.class.php

htdocs/langs/en_US/admin.lang

htdocs/langs/en_US/mails.lang

htdocs/langs/fr_FR/admin.lang

htdocs/langs/fr_FR/mails.lang

htdocs/lib/CMailFile.class.php

htdocs/lib/functions.inc.php