Merge branch 'master' of https://github.com/reactjs/reactjs.org into sync-e60bca04

Author: reactjs-translation-bot

content/blog/2017-09-08-dom-attributes-in-react-16.md

@@ -32,7 +32,7 @@ React has always provided a JavaScript-centric API to the DOM. Since React compo
 <div tabIndex={-1} />
 ```
 
-This has not changed. However, the way we enforced it in the past forced us to maintain a allowlist of all valid React DOM attributes in the bundle:
+This has not changed. However, the way we enforced it in the past forced us to maintain an allowlist of all valid React DOM attributes in the bundle:
 
 ```js
 // ...

content/docs/testing-recipes.md

@@ -393,7 +393,7 @@ it("changes value when clicked", () => {
     render(<Toggle onChange={onChange} />, container);
   });
 
-  // get ahold of the button element, and trigger some clicks on it
+  // get a hold of the button element, and trigger some clicks on it
   const button = document.querySelector("[data-testid=toggle]");
   expect(button.innerHTML).toBe("Turn on");