minor: server status style update

Author: Sam Kleinman

source/reference/server-status.txt

@@ -922,12 +922,11 @@ asserts
 
 .. status:: asserts
 
-   The :status:`asserts` data structure provides an account of the
-   number of asserts on the database. While assert errors are
-   typically uncommon, if there are non-zero values for the
-   :status:`asserts`, you should check the log file for the
-   :program:`mongod` process for more information. In many cases these
-   errors are trivial, but are worth investigating.
+   The :status:`asserts` document reports the number of asserts on the
+   database. While assert errors are typically uncommon, if there are
+   non-zero values for the :status:`asserts`, you should check the log
+   file for the :program:`mongod` process for more information. In
+   many cases these errors are trivial, but are worth investigating.
 
 .. status:: asserts.regular
 
@@ -949,7 +948,7 @@ asserts
 
 .. status:: asserts.user
 
-   The :status:`asserts.users` counter reports the number of "user asserts"
+   The :status:`asserts.user` counter reports the number of "user asserts"
    that have occurred since the last time the server process
    started. These are errors that user may generate, such as out of
    disk space or duplicate key. You can prevent these assertions by