Improve IMA readme

extensions/ima/README.md

@@ -27,11 +27,11 @@ locally. Instructions for doing this can be found in ExoPlayer's
 ## Using the extension ##
 ## Using the extension ##
 
 
 To use the extension, follow the instructions on the
 To use the extension, follow the instructions on the
-[Ad insertion page](https://exoplayer.dev//ad-insertion.html#declarative-ad-support)
-of the developer guide, passing an `AdsLoaderProvider` that returns an
-`ImaAdsLoader` when configuring the player's `DefaultMediaSourceFactory`. Note
-that the IMA extension only supports players which are accessed on the
-application's main thread.
+[Ad insertion page](https://exoplayer.dev/ad-insertion.html#declarative-ad-support)
+of the developer guide. The `AdsLoaderProvider` passed to the player's
+`DefaultMediaSourceFactory` should return an `ImaAdsLoader`. Note that the IMA
+extension only supports players which are accessed on the application's main
+thread.
 
 
 Resuming the player after entering the background requires some special handling
 Resuming the player after entering the background requires some special handling
 when playing ads. The player and its media source are released on entering the
 when playing ads. The player and its media source are released on entering the