[ESS] drop empty help buffers

[Rodney Sparapani]

Sam Steingold wrote:
> this is repeated in the official user RFE file rsn.txt:
> 
> Ross Boylan:
> 
> I wish that ?foo, where foo is a non-existent
> command, didn't leave a *help[R](foo)* buffer lying around.
> 
> yet, actually, it has already been implemented: just customise
> ess-help-kill-bogus-buffers to t.
> 

Seems like this should be the default.  I can't see a downside to that.

-- 
Rodney Sparapani, PhD  Center for Patient Care and Outcomes Research
Sr. Biostatistician               http://www.mcw.edu/pcor
4 wheels good, 2 wheels better!   Medical College of Wisconsin (MCW)
WWLD?:  What Would Lombardi Do?   Milwaukee, WI, USA