> > > Note that you get warnings for this when using ruby -w
> >
> > I know - but then the code already has been written. I think it
> > just has to be mentioned, not changed.
>
> Agreed.. maybe the pitfall is not running with ruby -w during
> development :)

Simply

win32:
C:\> set RUBYOPT=w

unix:
sh# export RUBYOPT="w"
 or
csh# setenv RUBYOPT "w"

that will help you much, even without 'ruby -w' as it will magically
set it all up for you