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

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

Change-Id: Ifb7fea117f354c7f02f26926a5afdf7d67bc5919

configs/ruby/Garnet_standalone.py

@@ -31,6 +31,7 @@ from m5.defines import buildEnv
 from m5.util import addToPath
 from .Ruby import create_topology, create_directories
 
+
 #
 # Declare caches used by the protocol
 #