Documentation Link

https://matplotlib.org/devdocs/api/_as_gen/mpl_toolkits.mplot3d.axes3d.Axes3D.set_aspect.html

Problem

Axes3D.set_aspect calls super() to run the Axes.set_aspect method, which is probably unnecessary.
There are two knock-on effects:

1. The default adjustable argument when None is not currently documented
2. The anchor argument doesn't make sense for 3D axes, and should be factored out

Suggested improvement

Deprecate the anchor argument, which probably means removing the super call. And document the default adjustable behavior when None.