Fix up code review spelling grammar

doc/ref/configuration/master.rst

@@ -202,8 +202,8 @@ following the Filesystem Hierarchy Standard (FHS) might set it to
 .. versionadded:: 3007
 
 When defined, the master will operate in cluster mode. The master will send the
-cluster key and id to minions instead of it's own key and id. The master will
-also forward it's local event bus to other masters defined by ``cluster_peers``
+cluster key and id to minions instead of its own key and id. The master will
+also forward its local event bus to other masters defined by ``cluster_peers``
 
 
 .. code-block:: yaml

doc/topics/highavailability/index.rst

@@ -18,7 +18,7 @@ Salt masters can be configured to act as a cluster. All masters in a cluster
 are peers. Job workloads are shared accross the cluster. Master clusters
 provide a way to scale masters horizontally. They do not require changes to
 the minions' configuration to add more resources. Cluster implementations are
-expected to use a load balancer, shared filesystem, and run on areliable
+expected to use a load balancer, shared filesystem, and run on a reliable
 network.
 
 :ref:`Master Cluster Tutorial <tutorial-master-cluster>`

doc/topics/tutorials/master-cluster.rst

@@ -28,7 +28,7 @@ Each master in a cluster maintains its own public and private key, and an in
 memory aes key. Each cluster peer also has access to the `cluster_pki_dir`
 where a cluster wide public and private key are stored. In addition, the cluster
 wide aes key is generated and stored in the `cluster_pki_dir`. Further,
-when operation as a cluster, minion keys are stored in the `cluster_pki_dir`
+when operating as a cluster, minion keys are stored in the `cluster_pki_dir`
 instead of the master's `pki_dir`.