The updates to the API docs for the new v2.1 release apparently has some consequences for downstream documentation.

In a few places in astropy we link to matplotlib.pyplot using intersphinx. However the new mapping doesn't have this it any more in the module mapping part.

I wonder what is the suggested approach? I would like to avoid hard wiring a link, or not linking at all. Also, the link using the old inventory resolves to http://matplotlib.org/api/pyplot_api.html#module-matplotlib.pyplot and it still seems to work, just missing from the new inventory.