Update index.md (#768)

edits

Author: wheresaddie

docs/tutorials/runtime-migration/index.md

@@ -1,18 +1,18 @@
 ---
-title: Introduction
+Introduction
 ---
 
-One of the defining features of the Substrate blockchain development framework is its support for
+One of the defining features of the Substrate blockchain development framework is the support for
 **forkless runtime upgrades**. Forkless upgrades are a means of enhancing a blockchain runtime in a
-way that is supported and protected by the capabilities of the blockchain itself. A blockchain's
+way that supports and protects the capabilities of the blockchain itself. A blockchain's
 [runtime](../../knowledgebase/runtime) defines the [state](../../knowledgebase/runtime/storage) the
 blockchain can hold and also defines the logic for effecting changes to that state. Substrate makes
 it possible to deploy enhanced runtime capabilities (including _breaking_ changes) without a
 [hard fork](../../knowledgebase/getting-started/glossary#fork). These new capabilities expect the
-blockchain's state and storage schema to be configured in the correct way for operation, though.
-If the expected schema and state are not present a [storage migration](../../knowledgebase/runtime/upgrades.md#storage-migrations) is necessary.
+blockchain state and storage schema to be configured in the correct way for operation.
+If the expected schema and state are not present, a [storage migration](../../knowledgebase/runtime/upgrades.md#storage-migrations) is necessary.
 
-This tutorial will use the Substrate Developer Hub
+This tutorial will use the Substrate
 [Node Template](https://github.com/substrate-developer-hub/substrate-node-template) to explore how to write and perform storage migrations of [FRAME](../../knowledgebase/runtime/frame)-based runtimes.
 > TODO: outline of steps
 
@@ -33,8 +33,8 @@ will guide you through the process of setting up your development environment. T
 system for runtime development and guide you through the process of extending the capabilities of a
 FRAME runtime by adding a pallet. The [Perform a Forkless Upgrade](../../tutorials/upgrade-a-chain/) tutorial will introduce runtime upgrades.
 
-If you're an experienced developer and wish to skip those
-tutorials, you can clone the
+If you're a more experienced developer and wish to skip those
+tutorials, you can clone the 
 [Node Template repository](https://github.com/substrate-developer-hub/substrate-node-template) and
 refer to the
 [documentation for local development](https://github.com/substrate-developer-hub/substrate-node-template#local-development).