[fix][doc] improve and fix admin interface doc (apache#18526)

Co-authored-by: tison <wander4096@gmail.com>

site2/docs/admin-api-brokers.md

@@ -51,7 +51,12 @@ Fetch all available active brokers that are serving traffic with cluster name.
 
 ```shell
 pulsar-admin brokers list use
-broker1.use.org.com:8080
+```
+
+Example output:
+
+```
+localhost:8080
 ```
 
 </TabItem>
@@ -83,7 +88,14 @@ Fetch the information of the leader broker, for example, the service url.
 
 ```shell
 pulsar-admin brokers leader-broker
-BrokerInfo(serviceUrl=broker1.use.org.com:8080)
+```
+
+Example output:
+
+```json
+{
+  "serviceUrl" : "http://localhost:8080"
+}
 ```
 
 </TabItem>
@@ -117,15 +129,20 @@ It finds all namespaces which are owned and served by a given broker.
 
 ```shell
 pulsar-admin brokers namespaces use \
---url broker1.use.org.com:8080
+    --url localhost:8080
+```
 
-{
-  "my-property/use/my-ns/0x00000000_0xffffffff": {
-    "broker_assignment": "shared",
-    "is_controlled": false,
-    "is_active": true
-  }
-}
+Example output:
+
+```
+public/default/0x00000000_0x40000000    [broker_assignment=shared is_controlled=false is_active=true]
+public/default/0xc0000000_0xffffffff    [broker_assignment=shared is_controlled=false is_active=true]
+public/functions/0x40000000_0x80000000    [broker_assignment=shared is_controlled=false is_active=true]
+public/functions/0x00000000_0x40000000    [broker_assignment=shared is_controlled=false is_active=true]
+pulsar/standalone/localhost:8080/0x00000000_0xffffffff    [broker_assignment=shared is_controlled=false is_active=true]
+pulsar/localhost:8080/0x00000000_0xffffffff    [broker_assignment=shared is_controlled=false is_active=true]
+public/functions/0x80000000_0xc0000000    [broker_assignment=shared is_controlled=false is_active=true]
+public/default/0x80000000_0xc0000000    [broker_assignment=shared is_controlled=false is_active=true]
 ```
 
 </TabItem>
@@ -197,7 +214,19 @@ Fetch a list of all potentially updatable configuration parameters.
 
 ```shell
 pulsar-admin brokers list-dynamic-config
-brokerShutdownTimeoutMs
+```
+
+Example output:
+
+```
+forceDeleteNamespaceAllowed
+loadBalancerMemoryResourceWeight
+allowAutoTopicCreation
+brokerDeleteInactivePartitionedTopicMetadataEnabled
+managedLedgerInactiveLedgerRolloverTimeSeconds
+loadBalancerNamespaceBundleMaxMsgRate
+resourceUsageTransportPublishIntervalInSecs
+# omit...
 ```
 
 </TabItem>
@@ -229,7 +258,11 @@ Fetch a list of all parameters that have been dynamically updated.
 
 ```shell
 pulsar-admin brokers get-all-dynamic-config
-brokerShutdownTimeoutMs:100
+```
+Example output:
+
+```
+brokerShutdownTimeoutMs    100
 ```
 
 </TabItem>

site2/docs/admin-api-clusters.md

@@ -53,8 +53,8 @@ You can provision a new cluster using the [`create`](/tools/pulsar-admin/) subco
 
 ```shell
 pulsar-admin clusters create cluster-1 \
---url http://my-cluster.org.com:8080 \
---broker-url pulsar://my-cluster.org.com:6650
+    --url http://my-cluster.org.com:8080 \
+    --broker-url pulsar://my-cluster.org.com:6650
 ```
 
 </TabItem>
@@ -128,6 +128,10 @@ Use the [`get`](/tools/pulsar-admin/) subcommand and specify the name of the clu
 
 ```shell
 pulsar-admin clusters get cluster-1
+```
+Output:
+
+```json
 {
     "serviceUrl": "http://my-cluster.org.com:8080/",
     "serviceUrlTls": null,
@@ -168,8 +172,8 @@ Use the [`update`](/tools/pulsar-admin/) subcommand and specify new configuratio
 
 ```shell
 pulsar-admin clusters update cluster-1 \
---url http://my-cluster.org.com:4081 \
---broker-url pulsar://my-cluster.org.com:3350
+    --url http://my-cluster.org.com:4081 \
+    --broker-url pulsar://my-cluster.org.com:3350
 ```
 
 </TabItem>
@@ -242,10 +246,14 @@ Use the [`list`](/tools/pulsar-admin/) subcommand.
 
 ```shell
 pulsar-admin clusters list
+```
+
+Output:
+
+```
 cluster-1
 cluster-2
 ```
-
 </TabItem>
 <TabItem value="REST API">
 
@@ -275,7 +283,7 @@ Peer clusters can be configured for a given cluster in a Pulsar [instance](refer
 
 Use the [`update-peer-clusters`](/tools/pulsar-admin/) subcommand and specify the list of peer-cluster names.
 
-```
+```shell
 pulsar-admin update-peer-clusters cluster-1 --peer-clusters cluster-2
 ```