DOCS-2404: minor edits for streamlining

Author: Sam Kleinman

source/tutorial/add-user-administrator.txt

@@ -7,19 +7,20 @@ Create a User Administrator
 Overview
 --------
 
-The user administrator creates users and creates and assigns roles. The
+User administrators create users and create and assigns roles. A
 user administrator can grant any privilege in the database and can create
 new ones. In a MongoDB deployment, create the user administrator as the
 first user. Then let this user create all other users.
 
-To support creation of user administrators, MongoDB provides the
-:authrole:`userAdmin` and :authrole:`userAdminAnyDatabase` roles, both of
-which grant :ref:`actions <security-user-actions>` specific to user and
-role management and confer no additional privileges, in keeping with the
-policy of :term:`least privilege`.
+To provide user administrators, MongoDB has
+:authrole:`userAdmin` and :authrole:`userAdminAnyDatabase` roles,
+which grant access to :ref:`actions <security-user-actions>` that support user and
+role management. Following the policy of :term:`least privilege`
+:authrole:`userAdmin` and :authrole:`userAdminAnyDatabase`  confer no
+additional privileges.
 
-Carefully control these roles. A user with either of these roles can grant
-*itself* additional privileges. Specifically, a user with the
+Carefully control access to these roles. A user with either of these roles can grant
+*itself* unlimited additional privileges. Specifically, a user with the
 :authrole:`userAdmin` role can grant itself any privilege in the database.
 A user assigned either the :authrole:`userAdmin` role on the ``admin``
 database or the :authrole:`userAdminAnyDatabase` can grant itself any