address review

Author: vonovak

docs/navigation-lifecycle.md

@@ -40,7 +40,7 @@ const TabNavigator = createBottomTabNavigator(
 
 We start on the `HomeScreen` and navigate to `DetailsScreen`. Then we use the tab bar to switch to the `SettingsScreen` and navigate to `ProfileScreen`. After this sequence of operations is done, all 4 of the screens are mounted! If you use the tab bar to switch back to the `HomeStack`, you'll notice you'll be presented with the `DetailsScreen` - the navigation state of the `HomeStack` has been preserved!
 
-## React-Navigation lifecycle events
+## React Navigation lifecycle events
 
 Now that we understand how React lifecycle methods work in React Navigation, let's answer the question we asked at the beginning: "How do we find out that a user is leaving it or coming back to it?"
 
@@ -51,4 +51,4 @@ Many of your use cases may be covered with the [`withNavigationFocus` HOC](with-
 ## Summary
 
 - while React's lifecycle methods are still valid, React Navigation adds more lifecycle events that you can subscribe to through the `navigation` prop.
-- you may also use the `withNavigationFocus` HOC or `<NavigationEvents />` component to react to lifecycle changes
+- you may also use the `withNavigationFocus` HOC or `<NavigationEvents />` component to react to lifecycle changes