Resolve appveyor CI of "unexpected trailing whitespace"

MoreLinq/Reactive/Subject.cs

@@ -37,7 +37,7 @@ public sealed class Subject<T> : IObservable<T>, IObserver<T>
         bool IsMuted => _completed || _error != null;
 
         /// <summary>
-        /// 
+        /// Notifies the provider that an observer is to receive notifications.
         /// </summary>
         /// <param name="observer"></param>
         /// <returns></returns>
@@ -128,14 +128,14 @@ public void OnNext(T value)
         }
 
         /// <summary>
-        /// 
+        /// Action for Exception handling
         /// </summary>
         /// <param name="error"></param>
         public void OnError(Exception error) =>
             OnFinality(ref _error, error, (observer, err) => observer.OnError(err));
 
         /// <summary>
-        /// 
+        /// Action 
         /// </summary>
         public void OnCompleted() =>
             OnFinality(ref _completed, true, (observer, _) => observer.OnCompleted());