docs: fine-tune documentation about Instant Finality (#580)

Update addtional-feature.md

docs/addtional-feature.md

@@ -2,13 +2,13 @@
 
 ## Instant Finality
 
-Ethereum require a transaction to be on-chain(meaning the transaction is included in the latest block) before returning a final status(aka. transaction receipt) to users so they can know whether the transaction is success or not. 
+Ethereum requires a transaction to be on-chain (meaning the transaction is included in the latest block) before returning a transaction receipt with final status to users, so they know whether the transaction is success or not. 
 
-Godwoken provide a quicker way to confirm transaction. Once the transaction is validated in mempool, users can get instant transaction receipt. This feature is called Instant Finality.
+Godwoken provide a faster way to confirm transaction. Once a transaction is verified in the mempool, the instant transaction receipt will be generated immediately. This feature is called `Instant Finality`.
 
-If your want to build a low latency user experience for on-chain interaction in your dapp, you can turn on such feature by using the RPC with additional path or query parameter:
+If you want to build a low latency user experience for on-chain interactions in your dApp, you could turn on `Instant Finality` feature by using the RPC **with additional path or query parameter**:
 
-```sh
+```bash
 # http
 https://example_web3_rpc_url?instant-finality-hack=true
 https://example_web3_rpc_url/instant-finality-hack
@@ -17,6 +17,6 @@ https://example_web3_rpc_url/instant-finality-hack
 ws://example_web3_rpc_url/ws?instant-finality-hack=true
 ```
 
-Environment like [Hardhat](https://github.com/NomicFoundation/hardhat) will swallow the http url's query parameter, so you might want to use the `/instant-finality-hack` path to overcome that.
+**Note**: Environments like [Hardhat](https://github.com/NomicFoundation/hardhat) will swallow the http url's query parameter, so you might want to use the `/instant-finality-hack` path to overcome that.
 
-Also notice that under such mode, there might have some [compatibility issue](https://github.com/godwokenrises/godwoken-web3/issues/283) with Ethereum toolchain like `ether.js`. If you care more about the compatibility, please use the bare RPC url `https://example_web3_rpc_url`, which is consider to be most compatible with Ethereum.
+Also notice that under `instant-finality-hack` mode, there might be some [compatibility issue](https://github.com/godwokenrises/godwoken-web3/issues/283) with Ethereum toolchain like `ether.js`. If you care more about the compatibility, please use the bare RPC url `https://example_web3_rpc_url`, which is considered to be most compatible with Ethereum.