Small grammar fixes

conventions/08.closures-in-render.jsx

@@ -2,7 +2,7 @@
  * Avoid passing new closures to subcomponents.
  *
  * Here’s why: every time the parent component renders, a new function is created and passed to the input.
- * If the input were a React component, this would automatically trigger it to re-render, regardless of whether its other props have actually changed.
+ * If the input was a React component, this would automatically trigger it to re-render, regardless of whether its other props have actually changed.
  * Reconciliation is the most expensive part of React. Don’t make it harder than it needs to be! Plus, passing a class method is easier to read, debug, and change.
  */
 
@@ -13,7 +13,7 @@ class Example extends Component {
         type="text"
         value={model.name}
         // onChange={(e) => { model.name = e.target.value }}
-        // ^ Not this. Use the below:
+        // ^ Not this. Use the one below:
         onChange={this.handleChange}
         placeholder="Your Name"/>
     );