[qa] Reverted docformatter from 1.6.0.rc1 to 1.5.1

.pre-commit-config.yaml

@@ -6,7 +6,7 @@ repos:
     hooks:
       - id: black
   - repo: https://github.com/pycqa/docformatter
-    rev: v1.6.0.rc1
+    rev: v1.5.1
     hooks:
       - id: docformatter
   - repo: https://github.com/pycqa/isort

src/bob/io/base/testing_utils.py

@@ -101,6 +101,7 @@ def extension_available(extension):
        def my_test():
          ...
     """
+
     def test_wrapper(test):
         @functools.wraps(test)
         def wrapper(*args, **kwargs):