[FIX] account, mail, etc.: uniformize evaluated expressions

addons/account/account.py

addons/account/wizard/account_invoice_refund.py

addons/account_test/report/account_test_report.py

addons/anonymization/anonymization.py

addons/base_action_rule/base_action_rule.py

addons/delivery/delivery.py

addons/l10n_fr/report/base_report.py

addons/mail/mail_alias.py

addons/process/process.py

addons/purchase/purchase.py

addons/share/wizard/share_wizard.py

addons/web_diagram/controllers/main.py

openerp/report/report_sxw.py