minor: wording change

Author: Sam Kleinman

source/reference/database-profiler.txt

@@ -70,10 +70,10 @@ example document reflects an update operation:
 Output Reference
 ----------------
 
-For a given operation, the database profiler reports a specific set of
-information. Depending on the type of operation profiled, the documents
-in the system.profile collection include a subset of the fields listed
-below:
+For any single operation, the documents created by the database
+profiler will include a subset of the following fields. The precise
+selection of fields in these documents depends on the type of
+operation.
 
 .. stats:: ts