Merge branch 'master' of https://github.com/reactjs/reactjs.org into sync-1f27bba9

Author: reactjs-translation-bot

content/docs/codebase-overview.md

@@ -211,7 +211,7 @@ Its main goals are:
 * Ability to return multiple elements from `render()`.
 * Better support for error boundaries.
 
-You can read more about React Fiber Architecture [here](https://github.com/acdlite/react-fiber-architecture) and [here](https://medium.com/react-in-depth/inside-fiber-in-depth-overview-of-the-new-reconciliation-algorithm-in-react-e1c04700ef6e). While it has shipped with React 16, the async features are not enabled by default yet.
+You can read more about React Fiber Architecture [here](https://github.com/acdlite/react-fiber-architecture) and [here](https://blog.ag-grid.com/inside-fiber-an-in-depth-overview-of-the-new-reconciliation-algorithm-in-react). While it has shipped with React 16, the async features are not enabled by default yet.
 
 Its source code is located in [`packages/react-reconciler`](https://github.com/facebook/react/tree/master/packages/react-reconciler).
 

content/docs/hooks-custom.md

@@ -201,7 +201,7 @@ Custom Hooks offer the flexibility of sharing logic that wasn't possible in Reac
 
 Try to resist adding abstraction too early. Now that function components can do more, it's likely that the average function component in your codebase will become longer. This is normal -- don't feel like you *have to* immediately split it into Hooks. But we also encourage you to start spotting cases where a custom Hook could hide complex logic behind a simple interface, or help untangle a messy component.
 
-For example, maybe you have a complex component that contains a lot of local state that is managed in an ad-hoc way. `useState` doesn't make centralizing the update logic any easier so might you prefer to write it as a [Redux](https://redux.js.org/) reducer:
+For example, maybe you have a complex component that contains a lot of local state that is managed in an ad-hoc way. `useState` doesn't make centralizing the update logic any easier so you might prefer to write it as a [Redux](https://redux.js.org/) reducer:
 
 ```js
 function todosReducer(state, action) {

content/docs/hooks-faq.md

@@ -694,7 +694,7 @@ function Counter() {
 
 In more complex cases (such as if one state depends on another state), try moving the state update logic outside the effect with the [`useReducer` Hook](/docs/hooks-reference.html#usereducer). [This article](https://adamrackis.dev/state-and-use-reducer/) offers an example of how you can do this. **The identity of the `dispatch` function from `useReducer` is always stable** — even if the reducer function is declared inside the component and reads its props.
 
-As a last resort, if you want to something like `this` in a class, you can [use a ref](/docs/hooks-faq.html#is-there-something-like-instance-variables) to hold a mutable variable. Then you can write and read to it. For example:
+As a last resort, if you want something like `this` in a class, you can [use a ref](/docs/hooks-faq.html#is-there-something-like-instance-variables) to hold a mutable variable. Then you can write and read to it. For example:
 
 ```js{2-6,10-11,16}
 function Example(props) {