Python Visualizer is cluttered

[avaneesh-pandey5]

I tried using the Python Demo of insertion sort and got this back, I tried other demos too but got a similar result while using the python debugger.

[nekiynekit]

You can fix it on your own just changing 16th line as follow:
return json.dumps(formatted)
Of course don't forget to import json. I suppose there should be PR about it.