Merge pull request #1528 from bgrabar/minor-8

typo

Author: Bob Grabar

source/core/authorization.txt

@@ -17,7 +17,7 @@ with a dedicated purpose for a common use case. Examples include the
 :authrole:`root` roles.
 
 Administrators also can create new roles and privileges to cater to
-operational needs. Administrator can assign privileges scoped as
+operational needs. Administrators can assign privileges scoped as
 granularly as the collection level.
 
 When granted a role, a user receives all the privileges of that role. A