Merge<T>(IEnumerable<Observable<T>> sources) -> Merge<T>(this IEnumer…

…able<Observable<T>> sources)

src/R3/Factories/Merge.cs

@@ -7,7 +7,7 @@ public static Observable<T> Merge<T>(params Observable<T>[] sources)
         return new Merge<T>(sources);
     }
 
-    public static Observable<T> Merge<T>(IEnumerable<Observable<T>> sources)
+    public static Observable<T> Merge<T>(this IEnumerable<Observable<T>> sources)
     {
         return new Merge<T>(sources);
     }