riotctrl.ctrl: use subprocess's DEVNULL for DEVNULL

miri64 · miri64 · commit 36f540eccbc8 · 2021-09-09T16:03:11.000+02:00
diff --git a/riotctrl/ctrl.py b/riotctrl/ctrl.py
@@ -13,7 +13,7 @@
 import pexpect
 
 
-DEVNULL = open(os.devnull, 'w')
+DEVNULL = subprocess.DEVNULL
 MAKE = os.environ.get('MAKE', 'make')
 
 
