Typo fixes

Change-Id: I882ce0d573d48f87a85d37b821ea6c60c23e675a

Author: samtstern

app/src/main/java/com/firebase/uidemo/database/firestore/FirestorePagingActivity.java

@@ -101,7 +101,7 @@ protected void onLoadingStateChanged(@NonNull LoadingState state) {
                                 break;
                             case FINISHED:
                                 mProgressBar.setVisibility(View.GONE);
-                                showToast("Reached end of data set,");
+                                showToast("Reached end of data set.");
                                 break;
                             case ERROR:
                                 showToast("An error occurred.");

firestore/README.md

@@ -118,7 +118,7 @@ Fear not, FirebaseUI does all of this for you automatically!
 
 FirebaseUI offers two types of RecyclerView adapters for Cloud Firestore:
 
-  * `FirestoreRecyclerAdapter` — binds a `Query` to a `RecyclerView` and respond to all real-time
+  * `FirestoreRecyclerAdapter` — binds a `Query` to a `RecyclerView` and responds to all real-time
     events included items being added, removed, moved, or changed. Best used with small result sets
     since all results are loaded at once.
   * `FirestorePagingAdapter` — binds a `Query` to a `RecyclerView` by loading data in pages. Best

firestore/src/main/java/com/firebase/ui/firestore/paging/FirestoreDataSource.java

@@ -182,7 +182,7 @@ public void onSuccess(QuerySnapshot snapshot) {
             mLoadingState.postValue(LoadingState.LOADED);
 
             // Post the 'FINISHED' state when no more pages will be loaded. The data source
-            // callbacks interpret and empty result list as a signal to cancel any future loads
+            // callbacks interpret an empty result list as a signal to cancel any future loads.
             if (snapshot.getDocuments().isEmpty()) {
                 mLoadingState.postValue(LoadingState.FINISHED);
             }