The way I think about it is that if black's output looks weird, you should probably restructure your code. It's not _always_ true, but often enough it means the code can be made simpler, some values created in flight can be given names, and so on.
And this defeats trying to reuse variable names from publication, so that a more-international audience can follow ‘ss’ rather than sum_of_squared_residuals_dude.
Julia promotes this as a war cry over Python.