misc: Run pre-commit run --all-files

This is reflect the updates made to black when running `pre-commit
autoupdate`.

Change-Id: Ifb7fea117f354c7f02f26926a5afdf7d67bc5919

src/sim/ClockDomain.py

@@ -37,6 +37,7 @@ from m5.params import *
 from m5.SimObject import SimObject
 from m5.proxy import *
 
+
 # Abstract clock domain
 class ClockDomain(SimObject):
     type = "ClockDomain"