Format Python code with psf/black push (#306)

There appear to be some python formatting errors in
25f3812. This pull request
uses the [psf/black](https://github.com/psf/black) formatter to fix
these issues.

docs/source/notebooks/minimal_tutorial.py

@@ -328,9 +328,9 @@
 config_store = create_config_store()
 
 run = Run(config_store.retrieve_run_config("example_run"))
-# if __name__ == "__main__":
-train_run(run)
 
+if __name__ == "__main__":
+    train_run(run)
 
 # %% [markdown]
 # ## Visualize