Minor cli doc updates (#725)

Signed-off-by: Adrian Sutton <adrian.sutton@consensys.net>

docs/Configuring-Pantheon/Testing-Developing-Nodes.md

@@ -31,10 +31,11 @@ To start a bootnode for a private network:
 2. Start the bootnode, specifying:
 
     * Genesis file and data directory as in the previous step. 
+    * No arguments for the [`--bootnodes` option](../Reference/Pantheon-CLI-Syntax.md#bootnodes) because this is your bootnode.
     
     !!! example
         ```
-        pantheon --genesis-file=privateNetworkGenesis.json --data-path=nodeDataPath
+        pantheon --genesis-file=privateNetworkGenesis.json --data-path=nodeDataPath --bootnodes
          ```
      
 To specify this bootnode for another node, the enode URL for the [`--bootnodes`](../Reference/Pantheon-CLI-Syntax.md#bootnodes) 

docs/Reference/Pantheon-CLI-Syntax.md

@@ -936,3 +936,4 @@ $ pantheon password-hash <my-password>
 
 ```bash tab="Example"
 $ pantheon password-hash "password123"
+```

docs/Using-Pantheon/RPC-PubSub.md

@@ -14,7 +14,7 @@ The RPC Pub/Sub methods are:
 
 !!!important
     Unlike other [JSON RPC-API methods](../Reference/JSON-RPC-API-Methods.md), 
-    the RPC Pub/Sub methods cannot be called over HTTP. Use the [`--rpc-ws-enabled`] option to enable
+    the RPC Pub/Sub methods cannot be called over HTTP. Use the [`--rpc-ws-enabled`](../Reference/Pantheon-CLI-Syntax.md#rpc-ws-enabled) option to enable
     the WebSockets JSON-RPC service. 
     
 ### Using RPC Pub/Sub