[Rd] documented but missing from the code (PR#1054)

[Kurt Hornik]

>>>>> Paul Gilbert writes:

BDR> Until very recently this was true for objects in zzz.R. One example in dse
BDR> is scale.default, which is not in the code and is in the documentation
BDR> (incorrectly). Generated objects are (correctly) marked as not in the code.

> I take this to mean that if I do

>   if(!exists(zzz)) zzz <- whatever

> then any documentation for zzz will generate the warning.

Correct.  Codoc could be refined to catch this: is currently only looks
at the top-level assignments.  But in the above case, one can argue that
defensiveness should give a warning: the package writer could provide a
totally different zzz and document it, and consistency of code and docs
would be conditional on non-existence of zzz ...

-k
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