Fix black complaints

These are newly detected by black 23.1.0.

Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>

tests/test_iso_wrapper.py

@@ -28,6 +28,7 @@ def fake_listdir(pattern, result=None, exc=None):
     """Create a function that mocks os.listdir. If the path contains pattern,
     result will be returned or exc raised. Otherwise it's normal os.listdir
     """
+
     # The point of this is to avoid issues on Python 2, where apparently
     # isdir() is using listdir(), so the mocking is breaking it.
     def worker(path):

tests/test_koji_wrapper.py

@@ -121,7 +121,6 @@ class KojiWrapperTest(KojiWrapperBaseTestCase):
         )
 
     def test_get_image_paths(self):
-
         # The data for this tests is obtained from the actual Koji build. It
         # includes lots of fields that are not used, but for the sake of
         # completeness is fully preserved.
@@ -321,7 +320,6 @@ class KojiWrapperTest(KojiWrapperBaseTestCase):
         )
 
     def test_get_image_paths_failed_subtask(self):
-
         failed = set()
 
         def failed_callback(arch):

tests/test_ostree_script.py

@@ -315,7 +315,6 @@ class OstreeTreeScriptTest(helpers.PungiTestCase):
 
     @mock.patch("kobo.shortcuts.run")
     def test_extra_config_with_keep_original_sources(self, run):
-
         configdir = os.path.join(self.topdir, "config")
         self._make_dummy_config_dir(configdir)
         treefile = os.path.join(configdir, "fedora-atomic-docker-host.json")