fix comments

docs/src/SUMMARY.md

@@ -3,7 +3,7 @@
 - [Introduction](./intro.md)
 - [Become a Validator](./validator.md)
 - [Installation](./install.md)
-- [Command-line Options](./cli.md)
+- [CLI](./cli.md)
 - [Advanced Usage for Developers](./advanced.md)
 - [FAQs](./faq.md)
 - [Contribute](./contribute.md)

docs/src/cli.md

@@ -1,4 +1,4 @@
-# Command-line Options
+# CLI
 
 You can run your customized beacon node using the beacon_node CLI. The available options are shown below.
 

docs/src/faq.md

@@ -4,7 +4,7 @@
 
 A complete introduction about the beacon chain can be found in the [Ethereum 2.0 blog series](https://our.status.im/two-point-oh-the-beacon-chain/).
 
-In short, the beacon chain is a **new type of blockchain** to help the Ethereum blockchain to smoothly transfer its consensus algorithm from PoW (Proof of Work) to PoS (Proof of Stake), aka Ethereum 2.0. You can also see it as a PoS + PoW solution.
+In short, the beacon chain is a **new type of blockchain** to help the Ethereum blockchain to smoothly transfer its consensus algorithm from PoW (Proof of Work) to PoS (Proof of Stake), aka Ethereum 2.0.
 
 ## 2. Differences Between Beacon Chain and Ethereum 1.0
 

docs/src/intro.md

@@ -14,7 +14,7 @@ In this book, we will cover:
 1. [What is beacon chain](./faq.md#1-what-is-beacon-chain) and [what is Nimbus](./faq.md#4-what-is-nimbus) to equip you with some basic knowledge.
 2. How to [become a validator](./validator.md) in Ethereum 2.0 as a user.
 3. [Installation steps](./install.md) for nimbus beacon chain.
-4. [Command-line options](./cli.md) for running your customized nimbus beacon node.
+4. [CLI](./cli.md) for running your customized nimbus beacon node.
 5. [Advanced usage](./advanced.md) for developers.
 6. Common [questions and answers](./faq.md) to satisfy your curiosity.
 7. How to [contribute](./contribute.md) to this book.