help(arima) return value typo?

in ?arima (R-1.9.1), the return value component 'convergence' should be
'code'?

Yes.  Not sure it says anywhere than R-help is the appropriate place for 
this and R-devel is better so I've moved it there.

(it's a pity there is no reliable way to check return value documentation
consistency with the code, or is there?)

There is not as the result can vary by input.  But you could try to 
contribute one!