ext: Stop excluding 'ext/testlib' from pre-commit and format (#267)

Though in "ext" this directory is regularly modified. `pre-commit`
should run on these files.

This PR includes running `pre-commit run --files ext/testlib` to
reformat the files in "ext/testlib" using Python Black.

Author: BobbyRBruce

.git-blame-ignore-revs

@@ -29,3 +29,6 @@ c3bd8eb1214cbebbc92c7958b80aa06913bce3ba
 
 # A commit which ran flynt all Python files.
 e73655d038cdfa68964109044e33c9a6e7d85ac9
+
+# A commit which ran pre-commit on ext/testlib
+9e1afdecefaf910fa6e266f29dc480a32b0fa83e

.pre-commit-config.yaml

@@ -40,7 +40,7 @@ default_language_version:
 
 exclude: |
   (?x)^(
-    ext/.*|
+    ext/(?!testlib/).*|
     build/.*|
     src/systemc/ext/.*|
     src/systemc/tests/.*/.*|

ext/testlib/__init__.py

@@ -36,9 +36,9 @@
 from .configuration import *
 from .main import main
 
-#TODO Remove this awkward bootstrap
-#FIXME
+# TODO Remove this awkward bootstrap
+# FIXME
 from gem5 import *
 
-#TODO Remove this as an export, users should getcwd from os
+# TODO Remove this as an export, users should getcwd from os
 from os import getcwd