style: flake8 findings
diff --git a/serial/rfc2217.py b/serial/rfc2217.py
index c8afa95..5e3cbe3 100644
--- a/serial/rfc2217.py
+++ b/serial/rfc2217.py
@@ -410,7 +410,7 @@
         if self.is_open:
             raise SerialException("Port is already open.")
         try:
-            self._socket = socket.create_connection(self.from_url(self.portstr), timeout=5) # XXX good value?
+            self._socket = socket.create_connection(self.from_url(self.portstr), timeout=5)  # XXX good value?
             self._socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
         except Exception as msg:
             self._socket = None