I have changed that in python4astronomers, but since we link to the auto-doc generated documentation, you will see the place where this object really comes from and not the "lazy user way" to import it., once you click the link, e.g. in http://docs.astropy.org/en/v0.2.1/_generated/astropy.io.ascii.cds.Cds.html#astropy.io.ascii.cds.Cds
the docs say
```
 class astropy.io.ascii.cds.Cds(readme=None)
 Bases: astropy.io.ascii.core.BaseReader
```
(In fact, that's where I copied the links).