Formatting: Format all python code with black.

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BUG=b:233893248
TEST=CQ

Change-Id: I66591d7a738d241aed3290138c0f68065ab10a6d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3879174
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Alex Klein <saklein@chromium.org>
diff --git a/scripts/build_api_unittest.py b/scripts/build_api_unittest.py
index eca6f6e..661fba0 100644
--- a/scripts/build_api_unittest.py
+++ b/scripts/build_api_unittest.py
@@ -12,22 +12,24 @@
 
 
 def testSmoke(tmp_path, monkeypatch):
-  """Basic confidence check"""
+    """Basic confidence check"""
 
-  def stub(*_args, **_kwargs):
-    return True
+    def stub(*_args, **_kwargs):
+        return True
 
-  monkeypatch.setattr(router_lib.Router, 'Route', stub)
+    monkeypatch.setattr(router_lib.Router, "Route", stub)
 
-  input_json = tmp_path / 'input.json'
-  output_json = tmp_path / 'output.json'
+    input_json = tmp_path / "input.json"
+    output_json = tmp_path / "output.json"
 
-  osutils.WriteFile(input_json, '{}')
+    osutils.WriteFile(input_json, "{}")
 
-  build_api.main([
-      '--input-json',
-      str(input_json),
-      '--output-json',
-      str(output_json),
-      'chromite.api.VersionService/Get',
-  ])
+    build_api.main(
+        [
+            "--input-json",
+            str(input_json),
+            "--output-json",
+            str(output_json),
+            "chromite.api.VersionService/Get",
+        ]
+    )