remove trailing spaces

Author: nakagami

firebirdsql/aio/fbcore.py

@@ -1023,5 +1023,5 @@ async def close(self):
     def __del__(self):
         if self.sock:
             # Async close cannot be called from __del__
-            # self.close() 
+            # self.close()
             pass

firebirdsql/aio/stream.py

@@ -47,7 +47,7 @@ async def _await_pending_send(self):
 
     async def async_recv(self, nbytes):
         await self._await_pending_send()
-        
+
         if len(self._buf) < nbytes:
             read_size = max(8192, nbytes - len(self._buf))
             chunk = await self.loop.sock_recv(self._sock, read_size)