tweak: transactions write concern blurb

Author: kay-kim

source/core/transactions.txt

@@ -406,13 +406,11 @@ Write Concern
 -------------
 
 You set the write concern at the transaction level, not at the
-individual operation level. Any write concern set at the collection,
-database, or client level is ignored inside the transaction. Do not
-explicitly set the write concern for the individual write operations.
-
-At the time of the commit, transactions use the transaction level
-:doc:`write concern </reference/write-concern>` to commit the write
-operations.
+individual operation level. At the time of the commit, transactions use
+the transaction level :doc:`write concern </reference/write-concern>`
+to commit the write operations. Individual operations inside the
+transaction ignore write concerns. Do not explicitly set the write
+concern for the individual write operations inside transactions.
 
 You can set the :doc:`write concern </reference/write-concern>` for the
 transaction commit at the transaction start.