Tense correction

docsite/rst/playbooks_roles.rst

@@ -70,7 +70,7 @@ If you are running Ansible 1.4 and later, include syntax is streamlined to match
     tasks:
      - { include: wordpress.yml, user: timmy, ssh_keys: [ 'keys/one.txt', 'keys/two.txt' ] }
 
-Using either syntax, variables passed in can then be used in the included files.  We've already covered them a bit in :doc:`playbooks_variables`.
+Using either syntax, variables passed in can then be used in the included files.  We'll cover them in :doc:`playbooks_variables`.
 You can reference them like this::
 
    {{ user }}