docs: fix RPC output examples for GET queries (#7799)

Remove JSON-RPC wrappers from GET output, since they are no longer printed.
Also format examples with jq so they look a little neater.

Fixes #7779.

Co-authored-by: William Banfield <4561443+williambanfield@users.noreply.github.com>

docs/tendermint-core/subscription.md

@@ -22,12 +22,12 @@ method via Websocket along with a valid query.
 
 ```json
 {
-    "jsonrpc": "2.0",
-    "method": "subscribe",
-    "id": 0,
-    "params": {
-        "query": "tm.event='NewBlock'"
-    }
+  "jsonrpc": "2.0",
+  "method": "subscribe",
+  "id": 0,
+  "params": {
+    "query": "tm.event='NewBlock'"
+  }
 }
 ```
 
@@ -50,26 +50,26 @@ Response:
 
 ```json
 {
-    "jsonrpc": "2.0",
-    "id": 0,
-    "result": {
-        "query": "tm.event='ValidatorSetUpdates'",
-        "data": {
-            "type": "tendermint/event/ValidatorSetUpdates",
-            "value": {
-              "validator_updates": [
-                {
-                  "address": "09EAD022FD25DE3A02E64B0FE9610B1417183EE4",
-                  "pub_key": {
-                    "type": "tendermint/PubKeyEd25519",
-                    "value": "ww0z4WaZ0Xg+YI10w43wTWbBmM3dpVza4mmSQYsd0ck="
-                  },
-                  "voting_power": "10",
-                  "proposer_priority": "0"
-                }
-              ]
-            }
-        }
+  "jsonrpc": "2.0",
+  "id": 0,
+  "result": {
+    "query": "tm.event='ValidatorSetUpdates'",
+    "data": {
+      "type": "tendermint/event/ValidatorSetUpdates",
+      "value": {
+        "validator_updates": [
+          {
+            "address": "09EAD022FD25DE3A02E64B0FE9610B1417183EE4",
+            "pub_key": {
+              "type": "tendermint/PubKeyEd25519",
+              "value": "ww0z4WaZ0Xg+YI10w43wTWbBmM3dpVza4mmSQYsd0ck="
+            },
+            "voting_power": "10",
+            "proposer_priority": "0"
+          }
+        ]
+      }
     }
+  }
 }
 ```

docs/tendermint-core/using-tendermint.md

@@ -47,8 +47,8 @@ definition](https://github.com/tendermint/tendermint/blob/master/types/genesis.g
 - `chain_id`: ID of the blockchain. **This must be unique for
   every blockchain.** If your testnet blockchains do not have unique
   chain IDs, you will have a bad time. The ChainID must be less than 50 symbols.
-- `initial_height`: Height at which Tendermint should begin at. If a blockchain is conducting a network upgrade, 
-    starting from the stopped height brings uniqueness to previous heights. 
+- `initial_height`: Height at which Tendermint should begin. If a blockchain is conducting a network upgrade,
+    starting from the stopped height brings uniqueness to previous heights.
 - `consensus_params` [spec](https://github.com/tendermint/spec/blob/master/spec/core/state.md#consensusparams)
     - `block`
         - `max_bytes`: Max block size, in bytes.