review comments fix

packages/in_app_purchase/CHANGELOG.md

@@ -2,7 +2,7 @@
 
 * Migrate the `Google Play Library` to 2.0.3.
      * **[Breaking Change]:**  Added `enablePendingPurchases` in `InAppPurchaseConnection`. The application has
-       to call this method when initializing the `InAppPurchaseConnection` on Android.
+       to call this method when initializing the `InAppPurchaseConnection` on Android. See [enablePendingPurchases](https://developer.android.com/reference/com/android/billingclient/api/BillingClient.Builder.html#enablependingpurchases) for more information.
      * Introduce a new class `BillingResultWrapper` which contains a detailed result of a BillingClient operation.
           * **[Breaking Change]:**  All the BillingClient methods that previously return a `BillingResponse` now return a `BillingResultWrapper`, including: `launchBillingFlow`, `startConnection` and `consumeAsync`.
           * **[Breaking Change]:**  The `SkuDetailsResponseWrapper` now contains a `billingResult` field in place of `billingResponse` field.

packages/in_app_purchase/example/lib/main.dart

@@ -9,6 +9,9 @@ import 'package:in_app_purchase/in_app_purchase.dart';
 import 'consumable_store.dart';
 
 void main() {
+  // For play billing library 2.0 on Android, it is mandatory to call
+  // [enablePendingPurchases](https://developer.android.com/reference/com/android/billingclient/api/BillingClient.Builder.html#enablependingpurchases)
+  // as part of initializing the app.
   InAppPurchaseConnection.enablePendingPurchases();
   runApp(MyApp());
 }

packages/in_app_purchase/lib/src/billing_client_wrappers/billing_client_wrapper.dart

@@ -75,10 +75,11 @@ class BillingClient {
 
   /// Enable the [BillingClientWrapper] to handle pending purchases.
   ///
-  /// This method is required to be called when initialize the application.
+  /// Play requires that you call this method when initializing your application.
   /// It is to acknowledge your application has been updated to support pending purchases.
   /// See [Support pending transactions](https://developer.android.com/google/play/billing/billing_library_overview#pending)
   /// for more details.
+  ///
   /// Failure to call this method before any other method in the [startConnection] will throw an exception.
   void enablePendingPurchases() {
     _enablePendingPurchases = true;