more detailed description of unmount event option

Author: szyablitsky

docs/additional-reading/turbolinks.md

@@ -99,7 +99,7 @@ TURBO: reactOnRailsPageLoaded
 ```
 
 ## Unmount event
-By default Turbolinks 5 will handle `turbolinks:before-visit` event. If you use the same component on different pages this can cause the temporary disappearance of component during page load and even moving parts of the page. To fix this issue switch unmount event to `turbolinks:before-render`.
+By default Turbolinks 5 will handle `turbolinks:before-visit` event for unmounting rendered components before visiting next page. If you use the same component on different pages this can cause the temporary disappearance of component during page load and even moving the parts of the page. To fix this issue switch unmount event to `turbolinks:before-render`.
 
 ```js
   ReactOnRails.setOptions({