[plt-scheme] Scribble for PLaneT packages

> Do you really need `#:use-sources'? It's for unusual cases where you
> want to document X as exported from Y, but Y really just re-exports
> from Z, and if someone looks for information on X from Z, then you  
> want
> them to find the docs for X from Y.

I was avoiding using (planet ...) forms because I did this once with a  
require statement in some actual code and I managed to mess up the  
package I was writing.

I guess you're saying it'll work if I do it in the docs. I'll give  
that a try.

Many thanks,

-- Dave