Tweak wording

Author: sophiebits

content/docs/hello-world.md

@@ -29,6 +29,6 @@ The next few sections will gradually introduce you to using React. We will exami
 
 ## A Note on JavaScript
 
-React is a JavaScript library, and so it assumes you have a basic understanding of the JavaScript language. If you don't feel very confident, we recommend [refreshing your JavaScript knowledge](https://developer.mozilla.org/en-US/docs/Web/JavaScript/A_re-introduction_to_JavaScript) so you can follow along more easily.
+React is a JavaScript library, and so we'll assume you have a basic understanding of the JavaScript language. If you don't feel very confident, we recommend [refreshing your JavaScript knowledge](https://developer.mozilla.org/en-US/docs/Web/JavaScript/A_re-introduction_to_JavaScript) so you can follow along more easily.
 
 We also use some of the ES6 syntax in the examples. We try to use it sparingly because it's still relatively new, but we encourage you to get familiar with [arrow functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions), [classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes), [template literals](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Template_literals), [`let`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/let), and [`const`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/const) statements. You can use the [Babel REPL](babel://es5-syntax-example) to check what ES6 code compiles to.