diff --git a/topic-4/book-1/04.Favorites.md b/topic-4/book-1/04.Favorites.md
index c5e0ff5..ec99c5f 100644
--- a/topic-4/book-1/04.Favorites.md
+++ b/topic-4/book-1/04.Favorites.md
@@ -91,8 +91,8 @@ const MovieCard: React.FC<MovieCardProps> = ({movie, selectFavourite}) => {
 ~~~
 + In the same file, replace the lines:
 ~~~tsx
-    <IconButton aria-label="add to favourites" onClick={null}>
-      <FavoriteIcon color="primary" fontSize="large" />
+    <IconButton aria-label="add to favorites">
+          <FavoriteIcon color="primary" fontSize="large" />
     </IconButton>
 ~~~
 with this:
@@ -126,7 +126,7 @@ with this:
         }
       />
 ~~~
-Until now, a component prop is either a data object or a callback functions. However, in the last excerpt above, a component is the value assigned to the title and avatar props. This is acceptable because a component transpiles to a function. Later we will develop custom components that accept other components as props.
+Until now, a component prop is either a data object or a callback function. However, in the last excerpt above, a component is the value assigned to the title and avatar props. This is acceptable because a component transpiles to a function. Later we will develop custom components that accept other components as props.
 
 The above changes cause the following runtime execution flow:
 1. On the Home page, the user clicks a movie card's Favourite icon.
@@ -181,7 +181,7 @@ ReactDOM.createRoot(document.getElementById('root')!).render(
   <React.StrictMode>
     <App />
   </React.StrictMode>,
-)
+);
 
 ~~~
 We must restart the development server whenever we nake routing configuration changes:
@@ -200,9 +200,9 @@ The app has a bug! Try the following sequence:
 
 Commit this work to the repository:
 ~~~
-$ git add -A
-$ git commit -m "Add to favourites logic completed; Dummy favourites page."
-$ git push origin main
+git add -A
+git commit -m "Add to favourites logic completed; Dummy favourites page."
+git push origin main
 ~~~
 
 [navigation]: ./img/navigation.png