[R] keep.source.pkgs()

[Rolf Turner]

Thomas Lumley wrote:

> The reason why detach and reload doesn't work but restarting does work for
> utils is that detach() does not unload the package, it only detaches it.
> This distinction was introduced with namespaces.  A package can be loaded
> but not in the search path.


Ah-ha.  The distinction between unloading and detaching --- which I
hadn't grokked --- would seem to be the key issue.  Now I get it.
Dankaschoen beaucoup.

				cheers,

					Rolf Turner