[Lint] Reformat to match new Black formatter version

Slight differences in formatting with the latest version.

Signed-off-by: David Feltell <[email protected]>

Author: feltech

tests/fixtures.py

@@ -4,6 +4,7 @@
 """
 Manager test harness test case fixtures for My Asset Manager.
 """
+
 from openassetio import constants
 from openassetio_mediacreation.traits.content import LocatableContentTrait
 from openassetio_mediacreation.traits.application import ConfigTrait

tests/test_manager.py

@@ -25,7 +25,6 @@
 from openassetio.test.manager import harness, apiComplianceSuite
 from openassetio.pluginSystem import PythonPluginSystemManagerPlugin
 
-
 #
 # Tests
 #