Use Activate modules as test scenario section name

issue9395
review291901002

tests/scenario_analytic_purchase.rst

@@ -18,7 +18,7 @@ Imports::
     ...     set_fiscalyear_invoice_sequences, create_payment_term
     >>> today = datetime.date.today()
 
-Install analytic_purchase::
+Activate modules::
 
     >>> config = activate_modules('analytic_purchase')