Fix comments

Author: tom-andersen

docs/readme.md

@@ -78,8 +78,9 @@ Release Notes
       as a Java file instead of precompiling it. This is to better support
       changes with the UnityPlayerActivity, and GameActivity options, in
       the Unity 2023 editor.
-    - Firestore: Added `Count()`, which fetches the number of documents in
-      the result set without actually downloading the documents.
+    - Firestore: Added `Query.Count()`, which fetches the number of documents in
+      the result set without actually downloading the documents
+      ([#659](https://github.com/firebase/firebase-unity-sdk/pull/659)).
 
 ### 10.6.0
 - Changes

firestore/src/AggregateQuery.cs

@@ -4,6 +4,9 @@
 using System.Threading.Tasks;
 
 namespace Firebase.Firestore {
+    /// <summary>
+    /// A query that calculates aggregations over an underlying query.
+    /// </summary>
     public sealed class AggregateQuery
     {
         private readonly AggregateQueryProxy _proxy;

firestore/src/AggregateQuerySnapshot.cs

@@ -12,10 +12,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-using BclType = System.Type;
 using Firebase.Firestore.Internal;
 
 namespace Firebase.Firestore {
+  /// <summary>
+  /// The results of executing an <c>AggregateQuerySnapshot</c>.
+  /// </summary>
   public sealed class AggregateQuerySnapshot {
     private readonly AggregateQuerySnapshotProxy _proxy;
     private readonly FirebaseFirestore _firestore;

firestore/src/AggregateSource.cs

@@ -18,7 +18,6 @@ namespace Firebase.Firestore {
   /// The sources from which an <see cref="AggregateQuery.GetSnapshotAsync"/> can retrieve its
   /// results.
   /// </summary>
-
   public enum AggregateSource {
     /// Perform the aggregation on the server and download the result.
     /// The result received from the server is presented, unaltered, without