Trad: The war against typo errors

htdocs/compta/facture.php

htdocs/facture.class.php

htdocs/langs/ar_AR/admin.lang

htdocs/langs/ar_AR/bills.lang

htdocs/langs/ar_AR/boxes.lang

htdocs/langs/ar_AR/commercial.lang

htdocs/langs/ar_AR/companies.lang

htdocs/langs/ar_AR/compta.lang

htdocs/langs/ar_AR/dict.lang

htdocs/langs/ar_AR/donations.lang

htdocs/langs/ar_AR/errors.lang

htdocs/langs/ar_AR/help.lang

htdocs/langs/ar_AR/install.lang

htdocs/langs/ar_AR/mails.lang

htdocs/langs/ar_AR/main.lang

htdocs/langs/ar_AR/members.lang

htdocs/langs/ar_AR/other.lang

htdocs/langs/ar_AR/products.lang

htdocs/langs/ar_AR/stocks.lang

htdocs/langs/ar_AR/users.lang