Enforcing assumptions

[Stelian Ionescu]

> I have been working on enforcing assumptions recently added to the ASDF
> docs.  Specifically, that OPERATION instances only be created by
> MAKE-OPERATION and SYSTEMs only be parsed inside LOAD-ASD.
> 
> I should have a merge request up for review soon, but find that it's
> more tricky than I expected, because we don't even play by the rules
> ourselves!  Specifically, there are calls to MAKE-INSTANCE on OPERATIONs
> in the ASDF codebase itself.

Thank you for the work.

-- 
Stelian Ionescu a.k.a. fe[nl]ix
Quidquid latine dictum sit, altum videtur.