Merge pull request #79 from reactjs/sync-b4b59062

Sync with reactjs.org @ b4b5906

Author: nutboltu

content/community/courses.md

@@ -18,8 +18,6 @@ permalink: community/courses.html
 
 - [React Armory: Learn React by Itself](https://reactarmory.com/guides/learn-react-by-itself) - With React Armory, you can learn React without the buzzwords.
 
-- [The Road to Learn React](https://www.robinwieruch.de/the-road-to-learn-react/) - Build a real world application in plain React without complicated tooling.
-
 - [Egghead.io: The Beginner's Guide to ReactJS](https://egghead.io/courses/the-beginner-s-guide-to-reactjs) - Free course for React newbies and those looking to get a better understanding of React fundamentals.
 
 - [Free React Bootcamp](https://tylermcginnis.com/free-react-bootcamp/) - Recordings from three days of a free online React bootcamp.
@@ -49,3 +47,5 @@ permalink: community/courses.html
 - [Tyler McGinnis](https://tylermcginnis.com/courses) - Tyler McGinnis provides access to his courses for a monthly fee. Courses include "React Fundamentals" and "Universal React".
 
 - [Mastering React](https://codewithmosh.com/p/mastering-react/) - Build professional interactive apps with React.
+
+- [Road to React](https://www.roadtoreact.com/) - Your journey to master React in JavaScript.

content/docs/concurrent-mode-patterns.md

@@ -792,7 +792,7 @@ The tradeoff we're making here is that `<ProfileTimeline>` will be inconsistent
 
 Whether or not it's an appropriate tradeoff depends on the situation. But it's a handy tool, especially when the content doesn't change noticeably between items, and the user might not even realize they were looking at a stale version for a second.
 
-It's worth noting that `useDeferredValue` is not *only* useful for data fetching. It also helps when an expensive component tree causes an interaction (e.g. typing in an input) to be sluggish. Just like we can "defer" a value that takes too long to fetch (and show its old value despite others components updating), we can do this with trees that take too long to render.
+It's worth noting that `useDeferredValue` is not *only* useful for data fetching. It also helps when an expensive component tree causes an interaction (e.g. typing in an input) to be sluggish. Just like we can "defer" a value that takes too long to fetch (and show its old value despite other components updating), we can do this with trees that take too long to render.
 
 For example, consider a filterable list like this:
 
@@ -926,7 +926,7 @@ function ProfilePage({ resource }) {
 
 The `revealOrder="forwards"` option means that the closest `<Suspense>` nodes inside this list **will only "reveal" their content in the order they appear in the tree -- even if the data for them arrives in a different order**. `<SuspenseList>` has other interesting modes: try changing `"forwards"` to `"backwards"` or `"together"` and see what happens.
 
-You can control how many loading states are visible at once with the `tail` prop. If we specify `tail="collapsed"`, we'll see *at most one* fallback at the time. You can play with it [here](https://codesandbox.io/s/adoring-almeida-1zzjh).
+You can control how many loading states are visible at once with the `tail` prop. If we specify `tail="collapsed"`, we'll see *at most one* fallback at a time. You can play with it [here](https://codesandbox.io/s/adoring-almeida-1zzjh).
 
 Keep in mind that `<SuspenseList>` is composable, like anything in React. For example, you can create a grid by putting several `<SuspenseList>` rows inside a `<SuspenseList>` table.
 

content/docs/state-and-lifecycle.md

@@ -417,12 +417,6 @@ this.setState(function(state, props) {
 
 একটি কম্পোনেন্ট তার state কে props হিসেবে এর child কম্পোনেন্টগুলোতে পাস করতে পারেঃ
 
-```js
-<h2>It is {this.state.date.toLocaleTimeString()}.</h2>
-```
-
-ইউজার-ডিফাইনড কম্পোনেন্টগুলোর ক্ষেত্রেও এটি কাজ করেঃ
-
 ```js
 <FormattedDate date={this.state.date} />
 ```

content/tutorial/tutorial.md

@@ -1195,7 +1195,7 @@ Congratulations! You've created a tic-tac-toe game that:
 * Stores a game's history as a game progresses,
 * Allows players to review a game's history and see previous versions of a game's board.
 
-Nice work! We hope you now feel like you have a decent grasp on how React works.
+Nice work! We hope you now feel like you have a decent grasp of how React works.
 
 Check out the final result here: **[Final Result](https://codepen.io/gaearon/pen/gWWZgR?editors=0010)**.
 

src/css/reset.css

@@ -13,6 +13,7 @@ html {
 body {
   overflow-x: hidden;
   position: relative;
+  filter: grayscale(100%);
 }
 
 * {