fix documentation lint issues

Author: FranGM

docs/api/baseplate/clients/index.rst

@@ -13,6 +13,7 @@ Instrumented Client Libraries
    baseplate.clients.kombu: Client for publishing to queues <kombu>
    baseplate.clients.memcache: Memcached Client <memcache>
    baseplate.clients.redis: Redis Client <redis>
+   baseplate.clients.redis_cluster: Redis Cluster Client <redis_cluster>
    baseplate.clients.requests: Requests (HTTP) Client <requests>
    baseplate.clients.sqlalchemy: SQL Client for relational databases (e.g. PostgreSQL) <sqlalchemy>
    baseplate.clients.thrift: Thrift client for RPC to other backend services <thrift>

docs/api/baseplate/clients/redis_cluster.rst

@@ -1,5 +1,5 @@
 ``baseplate.clients.redis_cluster``
-===========================
+===================================
 
 `Redis`_ is an in-memory data structure store used where speed is necessary but
 complexity is beyond simple key-value operations. (If you're just doing
@@ -44,8 +44,8 @@ configure it in your application's configuration file:
    # optional: how long to wait for a connection to establish
    foo.timeout = 3 seconds
 
-   # optional: Whether read requests should be directed to replicas
-   #  instead of the primary
+   # optional: Whether read requests should be directed to replicas as well
+   #  instead of just the primary
    foo.read_from_replicas = true
    ...