tests: fix pycodestyle violation with missing blank line

Fixes commit 0c146b2
Signed-off-by: Daniel P. Berrangé <[email protected]>

Author: berrange

tests/test_nodedev.py

@@ -157,6 +157,7 @@ def testPCIMdev():
     assert dev.type_id == "nvidia-11"
     assert dev.get_mdev_uuid() == "4b20d080-1b54-4048-85b3-a6a62d165c01"
 
+
 # libvirt <7.3.0 doesn't support <uuid> in the mdev node device xml
 @pytest.mark.skipif(libvirt.getVersion() < 7003000, reason="libvirt version doesn't support new mdev format")
 def testPCIMdevNewFormat():