documenting behaviour as clear as possible

lib/ansible/modules/utilities/logic/set_fact.py

@@ -25,7 +25,7 @@ module: set_fact
 short_description: Set host facts from a task
 description:
      - This module allows setting new variables.  Variables are set on a host-by-host basis just like facts discovered by the setup module.
-     - These variables will survive between plays during an Ansible run, but will not be saved across executions even if you use a fact cache.
+     - These variables will be available to subsequent plays during an ansible-playbook run, but will not be saved across executions even if you use a fact cache.
 options:
   key_value:
     description: