DOCS-493 removed em dashes

Author: Bob Grabar

source/core/replication.txt

@@ -21,7 +21,7 @@ replica sets as a more sophisticated form of traditional master-slave
 replication. [#master-slave]_ In master-slave replication, a
 :term:`master` node accepts writes while one or more :term:`slave`
 nodes replicate those write operations and thus maintain data sets
-identical to the master. In MongoDB terms, the member that accepts write
+identical to the master. In MongoDB deployments, the member that accepts write
 operations is the **primary**, and the replicating members are the
 **secondaries**.
 
@@ -59,19 +59,19 @@ variety of ways, as listed here. For details, see
 
 You can configure a member as any of the following:
 
-- Secondary-Only --- This member cannot become primary. See
+- **Secondary-Only**: These members cannot become primary. See
   :ref:`replica-set-secondary-only-members`.
 
-- Hidden --- This member is invisible to client applications. See
+- **Hidden**: These members are invisible to client applications. See
   :ref:`replica-set-hidden-members`.
 
-- Delayed --- This member applies operations from the primary's :term:`oplog` with
+- **Delayed**: These members apply operations from the primary's :term:`oplog` with
   a specified delay. See :ref:`replica-set-delayed-members`.
 
-- Arbiters --- This member does not hold data and exists solely to
+- **Arbiters**: These members do not hold data and exist solely to
   participate in :term:`elections <election>`. See :ref:`replica-set-arbiters`.
 
-- Non-Voting --- This member cannot vote in elections. See
+- **Non-Voting**: These members cannot vote in elections. See
   :ref:`replica-set-non-voting-members`.
 
 Failover