Merge pull request #2321 from snamiki1212/snamiki1212-patch-1

Author: markerikson

docs/usage/immer-reducers.md

@@ -474,7 +474,7 @@ It's worth going over the reasons why we consider Immer to be a critical part of
 
 Immer has two primary benefits. First, **Immer drastically simplifies immutable update logic**. [Proper immutable updates are extremely verbose](https://redux.js.org/usage/structuring-reducers/immutable-update-patterns#updating-nested-objects). Those verbose operations are hard to read overall, and also obfuscate what the actual intent of the update statement is. Immer eliminates all the nested spreads and array slices. Not only is the code shorter and easier to read, it's much more clear what actual update is supposed to happen.
 
-Second, [writing immutable updates correctly is _hard_](https://redux.js.org/usage/structuring-reducers/immutable-update-patterns), and and it is really easy to make mistakes (like forgetting to copy a level of nesting in a set of object spreads, copying a top-level array and not the item to be updated inside the array, or forgetting that `array.sort()` mutates the array). This is part of why [accidental mutations has always been the most common cause of Redux bugs](https://redux.js.org/faq/react-redux#why-isnt-my-component-re-rendering-or-my-mapstatetoprops-running). **Immer effectively _eliminates_ accidental mutations**. Not only are there no more spread operations that can be mis-written, but Immer freezes state automatically as well. This causes errors to be thrown if you do accidentally mutate, even outside of a reducer. **Eliminating the #1 cause of Redux bugs is a _huge_ improvement.**
+Second, [writing immutable updates correctly is _hard_](https://redux.js.org/usage/structuring-reducers/immutable-update-patterns), and it is really easy to make mistakes (like forgetting to copy a level of nesting in a set of object spreads, copying a top-level array and not the item to be updated inside the array, or forgetting that `array.sort()` mutates the array). This is part of why [accidental mutations has always been the most common cause of Redux bugs](https://redux.js.org/faq/react-redux#why-isnt-my-component-re-rendering-or-my-mapstatetoprops-running). **Immer effectively _eliminates_ accidental mutations**. Not only are there no more spread operations that can be mis-written, but Immer freezes state automatically as well. This causes errors to be thrown if you do accidentally mutate, even outside of a reducer. **Eliminating the #1 cause of Redux bugs is a _huge_ improvement.**
 
 Additionally, RTK Query uses Immer's patch capabilities to enable [optimistic updates and manual cache updates](../rtk-query/usage/manual-cache-updates.mdx) as well.