It uses the `format_array` function, which uses an appropriate `ArrayFormatter`. They all call `_make_fixed_width` which can justify either `right` or `left`. A third value can be added `justify=None`, but then **every** `ArrayFormatter` should be changed to support `justify=None`. I can add that, no problem :), but it will be a lot of changes, and I didn't wanted to do that just for this small enhancement that could be fixed in one line. If you think that the more general solution is better, I'll do that.