I think this should generate a link to the API docs, such as e.g. here:
http://docs.astropy.org/en/latest/units/index.html#using-astropy-units

Currently the link is broken:
http://docs.astropy.org/en/latest/config/index.html#using-config

The correct way to write this to generate the link is:
```
Using `astropy.config`
======================
```