style: Format HeadlinesFeedBloc and SearchBloc

- Added trailing commas
- Improved code readability

Author: fulleni

lib/headlines-feed/bloc/headlines_feed_bloc.dart

@@ -79,7 +79,7 @@ class HeadlinesFeedBloc extends Bloc<HeadlinesFeedEvent, HeadlinesFeedState> {
                   .whereType<Country>()
                   .map((c) => c.isoCode)
                   .toList(),
-      }, limit: _headlinesFetchLimit);
+      }, limit: _headlinesFetchLimit,);
       emit(
         HeadlinesFeedLoaded(
           headlines: response.items,
@@ -254,7 +254,7 @@ class HeadlinesFeedBloc extends Bloc<HeadlinesFeedEvent, HeadlinesFeedState> {
                   .whereType<Country>()
                   .map((c) => c.isoCode)
                   .toList(),
-      }, limit: _headlinesFetchLimit);
+      }, limit: _headlinesFetchLimit,);
       emit(
         HeadlinesFeedLoaded(
           headlines: response.items, // Replace headlines on refresh

lib/headlines-search/bloc/headlines_search_bloc.dart

@@ -82,7 +82,7 @@ class HeadlinesSearchBloc
     try {
       final response = await _headlinesRepository.readAllByQuery({
         'query': event.searchTerm,
-      }, limit: _limit);
+      }, limit: _limit,);
       emit(
         HeadlinesSearchSuccess(
           headlines: response.items,