Use Activate modules as test scenario section name

issue9395
review291901002

tests/scenario_purchase_amendment.rst

@@ -14,7 +14,7 @@ Imports::
     >>> from trytond.modules.account_invoice.tests.tools import \
     ...     set_fiscalyear_invoice_sequences
 
-Install purchase_amendment::
+Activate modules::
 
     >>> config = activate_modules('purchase_amendment')