python: Apply Black formatter to Python files

The command executed was `black src configs tests util`.

Change-Id: I8dfaa6ab04658fea37618127d6ac19270028d771
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/47024
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/python/m5/debug.py

@@ -31,30 +31,37 @@ from _m5.debug import SimpleFlag, CompoundFlag
 from _m5.debug import schedBreak, setRemoteGDBPort
 from m5.util import printList
 
+
 def help():
     sorted_flags = sorted(flags.items(), key=lambda kv: kv[0])
 
     print("Base Flags:")
-    for name, flag in filter(lambda kv: isinstance(kv[1], SimpleFlag)
-                             and not kv[1].isFormat, sorted_flags):
+    for name, flag in filter(
+        lambda kv: isinstance(kv[1], SimpleFlag) and not kv[1].isFormat,
+        sorted_flags,
+    ):
         print("    %s: %s" % (name, flag.desc))
     print()
     print("Compound Flags:")
-    for name, flag in filter(lambda kv: isinstance(kv[1], CompoundFlag),
-                             sorted_flags):
+    for name, flag in filter(
+        lambda kv: isinstance(kv[1], CompoundFlag), sorted_flags
+    ):
         print("    %s: %s" % (name, flag.desc))
         # The list of kids for flag "All" is too long, so it is not printed
         if name != "All":
-            printList([ c.name for c in flag.kids() ], indent=8)
+            printList([c.name for c in flag.kids()], indent=8)
         else:
             print("        All Base Flags")
     print()
     print("Formatting Flags:")
-    for name, flag in filter(lambda kv: isinstance(kv[1], SimpleFlag)
-                             and kv[1].isFormat, sorted_flags):
+    for name, flag in filter(
+        lambda kv: isinstance(kv[1], SimpleFlag) and kv[1].isFormat,
+        sorted_flags,
+    ):
         print("    %s: %s" % (name, flag.desc))
     print()
 
+
 class AllFlags(Mapping):
     def __init__(self):
         self._version = -1
@@ -98,4 +105,5 @@ class AllFlags(Mapping):
         self._update()
         return self._dict.items()
 
+
 flags = AllFlags()