I was unaware of the diff case for the "oxford comma" in the code, but I noticed that the black formatter put it in. The reordering case makes great sense, but

I was unaware of the diff case for the "oxford comma" in the code, but I noticed that the black formatter put it in. The reordering case makes great sense, but I actually prefer putting the commas on the left in a data structure for aesthetic inefficiency. Which is why setting aside superficial preference in favor of a standard formatter is superior.