Merge pull request #60 from kanchana-mongodb/DOCSP-12661

DOCSP-12661 doc for Add Replica Set Members methods

Author: kanchana-mongodb

source/reference/methods.txt

@@ -893,7 +893,7 @@ Replication Methods
      - Returns the status of the secondary members of the replica set. 
 
        This is identical to the ``db.printSecondaryReplicationInfo()`` 
-       method. This method returns the same output as the 
+       method. This method's output is similar to the 
        :method:`rs.printSlaveReplicationInfo()` method in the legacy 
        :binary:`~mongo` shell. The :method:`rs.printSlaveReplicationInfo()` method is deprecated in ``mongosh``. Use 
        ``rs.printSecondaryReplicationInfo()`` instead.
@@ -921,7 +921,7 @@ Replication Methods
      - Returns the status of the secondary members of the replica set. 
 
        This is identical to the ``rs.printSecondaryReplicationInfo()`` method. 
-       This method returns the same output as the 
+       This method's output is similar to the 
        :method:`db.printSlaveReplicationInfo()` method. The :method:`db.printSlaveReplicationInfo()` method is deprecated in ``mongosh``. Use 
        ``db.printSecondaryReplicationInfo()`` instead.
 
@@ -972,3 +972,15 @@ Replication Methods
 
      - Returns the status of the replica set member that ``mongosh`` is 
        connected to. 
+   * - :method:`rs.add()`
+
+     - Adds a member to the replica set. You must connect to the 
+       primary of the replica set to run this method.
+
+   * - :method:`rs.addArb()`
+
+     - Adds an arbiter to an existing replica set.
+
+   * - :method:`rs.remove()`
+
+     - Removes the member specified by hostname from the replica set.