Update review comment

Author: dhoomakethu

pymodbus/client/async/deprecated/__init__.py

@@ -21,7 +21,7 @@
     event_loop, future = Client(schedulers.IO_LOOP, port=5020)
 
     # For twisted based async client use
-    event_loop, future = Client(schedulers.REACTOR, port=5020)
+    event_loop, deferred = Client(schedulers.REACTOR, port=5020)
 
     # For asyncio based async client use
     event_loop, client = Client(schedulers.ASYNC_IO, port=5020)
@@ -44,4 +44,4 @@
 
 
 def deprecated(name): # pragma: no cover
-    warnings.warn(WARNING.format(name), DeprecationWarning)
+    warnings.warn(WARNING.format(name), DeprecationWarning)