reformat paragraph for line length

Author: kay-kim

source/core/sharded-cluster-high-availability.txt

@@ -77,11 +77,11 @@ To avoid downtime when renaming config servers, use DNS names
 unrelated to physical or virtual hostnames to refer to your
 :ref:`config servers <sharding-config-server>`.
 
-Generally, refer to each config server using DNS alias (e.g. a
+Generally, refer to each config server using the DNS alias (e.g. a
 CNAME record). When specifying the config server connection string to
-:program:`mongos`, use these names. These records make it possible
-to change the IP address or rename config servers without changing the connection
-string and without having to restart the entire cluster.
+:program:`mongos`, use these names. These records make it possible to
+change the IP address or rename config servers without changing the
+connection string and without having to restart the entire cluster.
 
 Shard Keys and Cluster Availability
 -----------------------------------